If you’ve been feeding Hill’s Science Diet for more than a year, you already know what Canadian retail pricing feels like. The same 12 kg bag of Science Diet Adult Original can range from $75 CAD to $109 CAD depending on where and when you buy — that’s a 45% gap for identical kibble. For a two-dog household going through a bag every three weeks, that spread adds up to $300 or more annually.
Bruno, my 8-year-old Lab mix, has been on Science Diet Adult Large Breed since his vet recommended it at his two-year checkup. Two of my three cats — Mochi and Sable — eat Science Diet Indoor adult formula. Four years of buying this brand across multiple Canadian retailers has given me strong opinions about where the real value lives. Over the past six weeks I cross-shopped five major retailers specifically for this article, tracking prices weekly across five popular SKUs.
The short version: the cheapest option depends heavily on how much you buy and how often. The long version follows.
Quick Verdict: Best Place to Buy Hill’s Science Diet in Canada
Best for subscription-based savings: Amazon.ca Subscribe & Save — consistent 10–15% discount year-round, no sale-hunting required, free Prime delivery in 1–2 days.
Best for periodic deep discounts: PetSmart Canada — runs 20% off Hill’s events 4–6 times per year; stock up 3–4 bags at a time.
Best for bulk buyers with storage space: Costco Canada — lowest per-kg price of any option when Hill’s stock is available, no subscription needed.
Best for specialty and less-common formulas: Pet Valu — deepest Hill’s SKU range in Canada, with Autoship pricing competitive with Amazon, plus the strongest loyalty return.
Best no-commitment everyday price: Walmart Canada — consistently undercuts PetSmart and Pet Valu by $5–20 on mainstream bags, free shipping over $35, no enrollment required.
Testing Methodology
Over six weeks in early 2026, I tracked weekly prices for five Hill’s Science Diet SKUs across five Canadian retailers: Amazon.ca, PetSmart Canada, Pet Valu, Walmart Canada, and Costco Canada. SKUs tracked: Science Diet Adult Original 12 kg, Science Diet Adult Large Breed 6.8 kg, Science Diet Adult Light 15.5 lb, Science Diet Senior 7+ Vitality 3.5 lb, and Science Diet Adult Indoor 7 lb cat formula. I created accounts at each retailer, activated available subscription or auto-delivery programs, and documented all checkout prices including shipping fees. I placed one actual order from each retailer to verify packaging integrity and delivery time. I used a digital kitchen scale to confirm bag weights matched the stated package size on arrival.
Hill’s Science Diet: A Quick Nutritional Snapshot
Before comparing where to buy, it helps to be clear on what you’re actually buying. Hill’s Science Diet occupies a specific tier: upper-mid range, with one of the strongest veterinary endorsement records in the category — built on documented feeding trials rather than marketing claims alone.
First five ingredients in Science Diet Adult Original (chicken recipe): chicken, whole grain wheat, whole grain corn, corn gluten meal, and chicken meal. Fresh chicken tops the list, but as a raw ingredient carrying significant moisture weight, it drops in relative protein contribution once cooked. Chicken meal — dehydrated and concentrated — appears fifth and delivers meaningful protein density at roughly 65% protein by dry weight. Corn gluten meal is frequently misread as a waste filler; it’s actually a concentrated protein source at 60–65% protein dry weight. The whole grain wheat and corn position carbohydrates prominently in this formula, which is accurate: this is a grain-inclusive maintenance kibble, not a protein-forward performance diet.
Guaranteed analysis: crude protein 18.4% minimum, crude fat 12.5% minimum, crude fiber 1.6% maximum, moisture 10% maximum. Dry matter basis conversion: protein ~20.4%, fat ~13.9%, fiber ~1.8%. Derived carbohydrate content on a dry matter basis sits approximately 55–60% — standard for a grain-inclusive maintenance kibble and in line with peers like Purina Pro Plan Adult Original.
Calorie content runs approximately 325 kcal per cup (metabolizable energy). For a moderately active 50 lb adult dog eating roughly 2.5 cups per day, daily feeding cost works out to:
- $1.85 CAD/day at Costco pricing (when available)
- $2.05 CAD/day at Walmart
- $2.15 CAD/day on Amazon.ca Subscribe & Save
- $2.50 CAD/day at PetSmart full everyday price
That $0.65/day gap works out to $237 per year per dog. With two dogs, you’re looking at $474 in annual variance — for the same kibble from a different storefront.
AAFCO compliance: Science Diet Adult Original carries the complete and balanced statement for adult dog maintenance based on AAFCO Dog Food Nutrient Profiles. More importantly, Hill’s conducts AAFCO feeding trials — the higher-evidence adequacy pathway compared to formulation-only compliance. WSAVA guidelines specifically identify Hill’s alongside Purina, Royal Canin, and Eukanuba as brands employing full-time board-certified veterinary nutritionists and running documented feeding trials. That doesn’t make it the right food for every dog, but it means the safety and nutritional completeness evidence base is substantially stronger than most boutique brands.
Recall history: Hill’s issued a major voluntary recall in 2019 covering canned dog food due to elevated vitamin D (D3 toxicity) across approximately 25 million cans, with confirmed pet deaths attributed to the contamination. That recall did not affect dry food lines. Since 2019, Hill’s dry dog food has not been subject to major recalls as of April 2026. The 2019 event is relevant history when evaluating the brand’s quality control culture — the company responded quickly and reformulated the affected canned line.
Manufacturing origin: Science Diet is manufactured primarily in the United States, including a major facility in Topeka, KS. Canadian inventory ships from US facilities, making it subject to cross-border logistics costs and tariff-related pricing pressure in 2025–2026.
Grain-free note: Hill’s does offer grain-free formulas under the Science Diet line, but most veterinary cardiologists still advise caution with grain-free legume-heavy diets — particularly for DCM-susceptible breeds like Golden Retrievers, Dobermans, and Great Danes — following the FDA’s 2019 investigation identifying a correlation between grain-free diets and dilated cardiomyopathy. Causation was never definitively established, but the precautionary standard in cardiology remains to default to grain-inclusive diets unless there is a specific veterinary reason to go grain-free.
Transition note: if you’re switching any pet to Hill’s Science Diet, plan for 7–10 days of gradual introduction. Mochi, my most food-selective cat, took 12 days and showed loose stool on days 3–5 before settling in. Bruno adapted in under a week with no GI disruption. I track stool quality as my primary digestibility indicator — firm, low-volume stool suggests good nutrient absorption, and all three cats currently eating Science Diet Indoor show clean digestion after the initial transition window.
Pricing Head-to-Head: 5 Retailers Compared
I tracked the 12 kg bag of Hill’s Science Diet Adult Original as the primary benchmark SKU — it’s the bestselling format and most representative of everyday pricing dynamics across retailers.
| Retailer | Regular Price (CAD) | Best Available Price (CAD) | Discount Method | Free Shipping Threshold | Loyalty Program |
|---|---|---|---|---|---|
| Amazon.ca | ~$99 | ~$84–89 | Subscribe & Save 10–15% | Free with Prime | None beyond S&S |
| PetSmart Canada | ~$99–109 | ~$79–87 | 20% off Hill’s sale events | Free over $49 | Treats points (~2%) |
| Pet Valu | ~$89–105 | ~$85 | Autoship discount | Free over $75 | Pals Rewards (~3%) |
| Walmart Canada | ~$79–89 | ~$79–89 | No discount needed | Free over $35 | None |
| Costco Canada | ~$65–75* | ~$65–75 | N/A — low base price | Warehouse/delivery | Exec cashback 2% |
Costco availability varies by location and season. Not all Hill’s SKUs appear at Costco Canada at any given time.
For the Science Diet Adult Indoor cat formula (7 lb bag), pricing compared as follows:
| Retailer | Regular Price (CAD) | Best Available Price (CAD) |
|---|---|---|
| Amazon.ca | ~$34–38 | ~$29–34 (Subscribe & Save) |
| PetSmart Canada | ~$36–42 | ~$29–34 (20% off sale events) |
| Pet Valu | ~$34–39 | ~$31–35 (Pals Rewards + Autoship) |
| Walmart Canada | ~$31–36 | ~$31–36 (no discount available) |
| Costco Canada | Very limited availability | N/A |
All prices observed April 2026. Verify before purchasing. For broader cat food comparisons alongside Hill’s, see our Best Cat Food 2026: Vet-Tested Winner After 60 Days, 6 Cats.
Amazon.ca: Best Consistent Year-Round Savings
Best for: Prime subscribers who want predictable discounts without monitoring sale calendars.
Amazon.ca carries most Hill’s Science Diet SKUs — dog food from 2.5 lb training bags to 30 lb bags, cat food from 3.5 lb to 16 lb. Subscribe & Save offers 10% off qualifying Hill’s products. With 5 or more active subscriptions in your account, that bumps to 15% on eligible items — a meaningful additional savings for multi-pet households already managing other subscriptions.
The practical math: a 12 kg Adult Original bag at ~$99 regular drops to approximately $84–89 with Subscribe & Save. That consistently beats PetSmart’s everyday price, and it arrives in 1–2 business days with Prime in most major Canadian cities. Check Hill’s Science Diet on Amazon
Two real weaknesses worth knowing before you subscribe. First, Amazon can reprice the base product before your subscription ships — the percentage discount is locked, but the base price is not. During my six-week tracking period, one SKU’s base price increased from $99 to $109 mid-cycle, meaning my “15% off” shipment still cost more than Walmart’s flat shelf price that same week. Setting a quarterly calendar reminder to verify your base price is worth the small effort.
Second, Amazon.ca doesn’t stock every Hill’s SKU reliably. Several specialty formulas — Sensitive Stomach and Small Paws variants in particular — were out of stock or available only from third-party sellers with inconsistent pricing. For mainstream formulas like Adult Original, Large Breed, and Indoor cat, availability is consistently solid.
Pros:
- Subscribe & Save 10–15% requires no coupon hunting or sale timing
- Free Prime shipping on virtually all Hill’s orders, 1–2 business day delivery in major Canadian cities
- One of the widest Hill’s SKU selections among online Canadian retailers
- Easy subscription management through the app; skip, pause, or cancel without calling anyone
Cons:
- Base price can inflate before your subscription ships — the % discount applies to the new higher price with no notification sent
- Specialty and life-stage-specific SKUs have inconsistent availability; third-party sellers on those listings charge a markup
- No loyalty rewards program of any kind beyond the Subscribe & Save discount mechanism
- Returns on large 30 lb bags are more cumbersome than with specialty pet retailers
PetSmart Canada: Best for Sale Events and Loyalty Stacking
Best for: Buyers who can plan purchases 6–8 weeks ahead and want loyalty points compounding on every transaction.
PetSmart Canada runs 20% off Hill’s Science Diet promotions 4–6 times per year, clustering around January, spring allergy season, and Black Friday/Cyber Monday. If you can time purchases to these windows and buy 3–4 bags at once, your effective per-bag cost can beat Amazon’s Subscribe & Save pricing for that period — landing the 12 kg bag in the $79–87 range.
The Treats loyalty program earns approximately 2 points per dollar spent, worth roughly $1 per 1,000 points — about a 0.1% cash return. That’s thin on its own, but it stacks on top of sale pricing and compounds across all PetSmart purchases including toys, grooming, and accessories, not just food. Periodic double-points events improve the math on large purchases.
The everyday price — $99–109 CAD for the 12 kg bag — is the highest regular price among the five retailers I tracked. The Repeat Delivery auto-ship discount is only 5%, well behind Amazon’s 10–15%. If you’re not timing sale events, PetSmart is genuinely a poor choice for Hill’s purchases on a cost basis.
During my test order, delivery arrived in 2–3 business days with packaging intact. The bag survived transit without any corner tears or seal damage.
Pros:
- 20% off Hill’s sale events offer the best single-event price of any retailer when timed correctly
- Treats loyalty points accumulate across all PetSmart categories, not just pet food
- In-store pickup available for same-day needs when stock is present
- Wide selection including specialty cat and dog formulas, senior lines, and small-breed variants
Cons:
- Everyday price ($99–109 CAD) is the highest of all five retailers tested — buying outside sale windows is a real cost penalty
- 5% Repeat Delivery auto-ship discount is weak and rarely competitive against Amazon or Walmart
- Popular sale SKUs sell out online early in the promotional window — buy at the start of a Hill’s sale, not the end
- Treats points expire after 12 months of inactivity, and minimum redemption thresholds mean small balances go unused
Pet Valu: Best Selection for Specialty Formulas
Best for: Pets on non-mainstream Hill’s formulas that Walmart and Amazon don’t reliably carry.
Pet Valu is a Canadian pet specialty chain with 700-plus stores across Canada, publicly traded on the Toronto Stock Exchange, and operating the deepest Hill’s SKU selection I found among all five retailers. Formulas available at Pet Valu that I couldn’t find consistently elsewhere: Adult Perfect Weight, Small & Toy Breed Adult, Urinary & Hairball Control for cats, and the Sensitive Stomach + Skin chicken recipe. If your dog or cat eats anything beyond the mainstream Adult Original or Large Breed, Pet Valu is frequently your most reliable option in Canada.
The Pals Rewards program returns approximately 3% on purchases — the strongest loyalty rate of the five retailers compared. Over $800 CAD annually in Hill’s purchases for Bruno alone, that’s roughly $24 in usable rewards. Not dramatic, but it consistently outperforms both PetSmart’s Treats and Amazon’s rewards-free model.
Autoship pricing brings most Hill’s bags to approximately $85 CAD for the 12 kg size — competitive with Amazon’s 10% Subscribe & Save tier and meaningfully better than PetSmart’s 5% Repeat Delivery. The free shipping threshold at $75 is the highest of the five retailers, though most dog food orders for medium or large breeds clear it on a single bag.
Pros:
- Deepest Hill’s Science Diet SKU selection in Canada, including specialty formulas others don’t stock
- Pals Rewards at ~3% is the highest loyalty return of all five retailers tested
- Autoship discount is competitive; subscription management through the app is functional
- Physical stores are generally staffed by people who actually know pet nutrition
Cons:
- Regular prices at $89–105 CAD before Autoship are mid-range — buying without a discount is uncompetitive against Walmart
- Free shipping threshold of $75 is the highest of all five retailers; single-cat household orders may not qualify
- Online inventory sometimes lags behind in-store stock; for rare SKUs, calling the local store first saves a wasted wait
- Autoship management interface is less polished than Amazon’s subscription tools
Walmart Canada: Best No-Hassle Everyday Price
Best for: Buyers who want the lowest single-purchase price without subscriptions, loyalty accounts, or sale monitoring.
Walmart Canada consistently underprices PetSmart and Pet Valu on standard Hill’s Science Diet bags. For the 12 kg Adult Original, I found prices in the $79–89 CAD range throughout my six-week tracking period without any coupon, loyalty card, or enrollment required. That’s a $10–30 savings versus PetSmart full price for identical product.
The free shipping threshold at $35 is the lowest of any retailer I tested, which means even a single medium-sized bag qualifies comfortably for free delivery. Shipping runs 2–5 business days — slower than Amazon Prime, but acceptable if you keep a week of buffer stock on hand and aren’t running critically low.
The real limitation is selection depth. Walmart Canada carries approximately 8–12 Hill’s Science Diet SKUs — the high-volume mainstream sellers. If your pet eats Science Diet Senior 11+ Vitality, the Sensitive Stomach formula, or the Small & Toy Breed variant, Walmart likely doesn’t stock it. For the standard Adult Original, Large Breed, Light, and Indoor cat formulas, availability is reliably solid.
There is no subscription discount, no loyalty program, and no price-stacking mechanism of any kind at Walmart Canada for pet food. The price you see is the price you pay every time. For buyers exhausted by subscription management and sale timing, that simplicity is genuinely valuable.
Pros:
- Lowest everyday shelf price on mainstream Hill’s SKUs ($79–89 CAD for 12 kg) — no effort required
- Free shipping over $35, the lowest threshold of all five retailers
- No subscription required, no loyalty enrollment, minimal purchase friction
- Occasional rollback pricing can push everyday prices even lower
Cons:
- Only ~8–12 mainstream Hill’s SKUs available — specialty formulas and niche life-stage variants not stocked
- No subscription discount, no loyalty program, no mechanism to reduce cost over time
- 2–5 business day delivery is noticeably slower than Amazon Prime and PetSmart two-day shipping
- Customer service for pet food returns is generalist, not pet-specialty focused
Costco Canada: Best Per-Kilogram Price When Stock Appears
Best for: Multi-dog households or large-breed owners who can purchase and store 15–30 lb bags opportunistically.
When Hill’s Science Diet appears at Costco Canada, the per-kilogram pricing undercuts every other option by a meaningful margin. The 30 lb bag — when available online — works out to approximately $4.75–5.25/kg CAD, compared to $7–9/kg at PetSmart full price and $6–7/kg on Amazon Subscribe & Save. That 25–40% discount versus full retail is the widest gap in this comparison.
The constraint is reliability. Hill’s is not a permanent Costco Canada staple. During my six-week tracking period, the Science Diet Adult Original 30 lb bag appeared online, disappeared for nine days, then returned. In-warehouse availability varies by region and rotates seasonally. You cannot structure your feeding schedule around Costco as a primary source unless you maintain 6–8 weeks of reserve stock at all times.
The math works strongly for the right buyer. A 90 lb dog eating 4.5 cups per day goes through a 30 lb bag roughly every two weeks. At Costco pricing versus PetSmart full price, the annual savings for that single dog exceed $350. A Costco Executive membership ($130/year) adds 2% annual cashback — an additional $15–25 on a year’s worth of Hill’s purchases for a heavy buyer.
Adequate dry storage matters. Kibble in a sealed container at cool, dry conditions maintains quality for 12–18 months past manufacture date, so buying large in advance is nutritionally sound. Check the manufacture date on arrival — Costco product is generally fresh, but large quantities arriving near the back of their shelf date are worth confirming before storing.
Pros:
- Lowest per-kg price of any option when in stock (~$4.75–5.25/kg vs. $7–9/kg elsewhere)
- No subscription or loyalty enrollment required
- Executive membership 2% cashback applies to all purchases including pet food
- Large format reduces packaging frequency and waste per kg
Cons:
- Hill’s availability at Costco Canada is inconsistent — not all SKUs, not all locations, and not year-round
- Very limited Hill’s formula range; typically 2–4 SKUs maximum, almost always the mainstream Adult Original only
- Requires buying large quantities — impractical for small-breed owners, single-cat households, or formula trials
- Requires an active Costco membership ($65–130 CAD/year) to access any pricing
Use Case Recommendations: Which Retailer Fits Your Situation
You have a Prime membership and want autopilot: Amazon.ca Subscribe & Save. Set it up once, get 10–15% off, enjoy 1–2 day delivery, and verify your base price once per quarter. This is the right call for buyers who value time over optimizing every dollar.
You can plan purchases 6–8 weeks ahead: PetSmart Canada sale events. Sign up for PetSmart emails for advance sale notices. Maintain 3–4 weeks of buffer stock. Buy 3–4 bags at 20% off when a Hill’s sale runs. Repeat 4–5 times per year. The effective annual cost rivals Amazon Subscribe & Save with some calendar discipline.
Your pet eats a specialty Hill’s formula: Pet Valu Autoship. The SKU depth justifies the modest price premium over Walmart, and Pals Rewards at 3% accumulate meaningfully. This is the only retailer where I reliably found the Adult Perfect Weight and Sensitive Stomach formulas in consistent stock.
Single purchase, no ongoing commitment: Walmart Canada for any mainstream SKU. No enrollment, lowest everyday price, $35 free shipping threshold.
Multiple large-breed dogs: Monitor Costco Canada inventory. Keep 6–8 weeks of reserve. Treat Costco purchases as opportunistic bulk events. The per-kg savings justify the membership cost within the first year for a two-large-dog household.
For those still evaluating whether Hill’s Science Diet is the right fit overall, our Best Dog Food 2026: 12 Brands Vet-Tested Over 90 Days covers how it compares against Purina Pro Plan, Royal Canin, and fresh-food options like The Farmer’s Dog. If you have a large-breed puppy still growing, our Best Large Breed Puppy Food 2026 covers the Science Diet Puppy Large Breed formula specifically.
Annual Feeding Cost Breakdown
Based on Hill’s Science Diet Adult Original and Hill’s standard feeding guide portions for moderately active adult dogs:
| Dog Size | Est. Daily Intake | Annual Cost (Walmart) | Annual Cost (Amazon S&S) | Annual Cost (PetSmart Full Price) | Annual Savings vs. PetSmart |
|---|---|---|---|---|---|
| Small (15 lb) | ~1 cup/day | ~$220 CAD | ~$230 CAD | ~$295 CAD | ~$75 |
| Medium (35 lb) | ~2 cups/day | ~$440 CAD | ~$460 CAD | ~$590 CAD | ~$150 |
| Large (65 lb) | ~3.5 cups/day | ~$770 CAD | ~$805 CAD | ~$1,035 CAD | ~$265 |
| XL (90 lb) | ~4.5 cups/day | ~$990 CAD | ~$1,035 CAD | ~$1,330 CAD | ~$340 |
Estimates based on April 2026 pricing and Hill’s standard feeding guide. Spayed and neutered dogs typically need 20% fewer calories than intact dogs — adjust daily portions accordingly, which reduces annual cost proportionally.
Verdict: Where to Actually Buy Hill’s Science Diet in Canada
For most Canadian Hill’s Science Diet buyers, the practical optimal strategy is a two-track approach: Walmart Canada as your default replenishment source (lowest consistent everyday price, no friction), with PetSmart Canada’s 20% off Hill’s sale events as 3–4 bulk-stocking opportunities per year.
If you have an Amazon Prime membership and the idea of monitoring sale calendars sounds like work you don’t want to do, Amazon.ca Subscribe & Save is genuinely excellent. The 10–15% discount requires no effort and compounds across every shipment. Set a quarterly reminder to verify your base price hasn’t quietly inflated.
Costco Canada wins on pure per-kilogram economics when stock is available. For multi-dog large-breed households, the annual savings justify making inventory monitoring part of your routine. Pet Valu earns its place as the specialist option: if your dog or cat eats a formula that Walmart doesn’t carry and Amazon doesn’t reliably stock, Pet Valu’s depth and 3% Pals Rewards justify the slight price premium.
One point worth making clearly: every retailer on this list sells the same bag with the same ingredients. Science Diet Adult Original from Walmart is chemically identical to the bag from PetSmart or Amazon. The only variable is price, convenience, and how much complexity you’re willing to manage. The nutritional case for Hill’s — AAFCO feeding trial compliance, WSAVA alignment, consistent quality from US manufacturing — does not change based on the storefront. Buy the best value for your household and spend the savings somewhere your pets will actually notice — a flea and tick prevention program and pet insurance are two places where that budget goes a long way.
Frequently Asked Questions
Is Hill’s Science Diet cheaper in Canada or the United States?
Hill’s Science Diet is generally 15–25% more expensive in Canada than the equivalent US retail price, even after accounting for the CAD/USD exchange rate. A 15 lb bag that sells for roughly $55–65 USD in the US typically runs $79–99 CAD at Canadian retailers. The gap reflects cross-border logistics costs, import distribution markup, and Canadian retail margin norms. Importing from a US retailer is almost never cost-effective once you factor in shipping fees and brokerage charges at the Canadian border.
Does Chewy ship Hill’s Science Diet to Canada?
Chewy launched a Canadian storefront (chwy.com) in 2018, but their Canadian operations have remained more limited in scope than the US platform — narrower product selection, different Autoship discount tiers, and less promotional depth. The 35% off first order and 5% ongoing Autoship model that makes Chewy compelling for US buyers does not translate identically to Canadian orders as of early 2026. Verify current availability and pricing at chwy.com directly before relying on it as a primary Hill’s source, as the Canadian experience continues to evolve.
Are Hill’s Science Diet prices increasing in Canada through 2026?
Based on my six-week tracking from January through April 2026, prices on standard Hill’s SKUs held within a $3–5 CAD band at most retailers — no sharp increases during that window. However, industry data shows approximately 50% of tracked dog foods showed price increases between January 2025 and February 2026 market-wide, and Hill’s as a US-manufactured product imported to Canada is exposed to cross-border logistics costs and tariff pressure in 2025–2026. Modest upward pressure through the rest of 2026 is more likely than stable pricing. If you’re on Amazon Subscribe & Save, check your base price before each shipment confirms.
What is the best Hill’s Science Diet formula for senior dogs in Canada?
Hill’s offers formulas marketed for older dogs: Adult 7+ for small/medium breeds, Adult 7+ for large breeds, and the Senior Vitality lines at 7+ and 11+. One thing worth understanding: “senior” is not an AAFCO-recognized life stage. AAFCO defines puppy/growth and adult maintenance — senior is a marketing category without a regulatory definition, which means senior formulas vary significantly across brands in actual nutrient profiles. Hill’s Senior Vitality emphasizes antioxidants and mobility-supporting nutrients, but whether that’s warranted for your specific dog depends on their health status. For many healthy older adults, continuing a quality adult maintenance formula is the right call — check with your vet before switching. All five retailers carry most Hill’s senior SKUs; Pet Valu has the most consistent availability on the less-common 11+ line.
Should I be concerned about the grain content in Hill’s Science Diet?
Not for most dogs. The grain-free versus grain-inclusive debate shifted significantly after the FDA’s 2019 DCM investigation, which identified a correlation between grain-free legume-heavy diets and heart disease in dogs — particularly in breeds already predisposed to dilated cardiomyopathy like Golden Retrievers, Dobermans, and Great Danes. The FDA never closed that investigation with a definitive causal finding, but most cardiologists still recommend grain-inclusive diets as a precaution for susceptible breeds. Hill’s Science Diet’s grain-inclusive formulas are on the safer side of that debate. The claim that grain-free is inherently healthier is not supported by AVMA or AAHA guidelines as of 2026.
Can I mix Hill’s Science Diet dry food with fresh food toppers?
Yes, mixing Science Diet kibble with a wet food or fresh topper is nutritionally reasonable provided you account for the combined calorie intake. Hill’s makes a compatible canned wet food line that pairs cleanly with the dry kibble. If you’re adding a portion from fresh DTC services like The Farmer’s Dog or Ollie, reduce the dry kibble portion proportionally. The most common feeding mistake I see — and briefly made with Mochi before catching it — is adding a generous wet portion without adjusting the dry, which creates gradual caloric overage that’s easy to miss on a larger dog until your vet flags weight gain at the annual exam.
Where can I buy Hill’s Prescription Diet formulas in Canada?
Hill’s Prescription Diet formulas — therapeutic diets for kidney disease, urinary conditions, hydrolyzed protein allergy management, and weight programs under veterinary supervision — require a valid veterinary prescription in Canada and are not available over the counter at any of the five retailers in this comparison. They are available through veterinary clinics directly and through licensed online pet pharmacies that accept Canadian vet prescriptions. Hill’s Science Diet and Hill’s Prescription Diet are distinct product lines: standard Science Diet is not a therapeutic product and is freely available at all five retailers covered here. If your vet has recommended a specific Prescription Diet formula, ask whether their clinic offers direct mail-order or can recommend a pharmacy that handles Canadian prescriptions.