If you’ve ever tried to fit a standard basket muzzle on a greyhound, you already know the problem. That long, narrow snout — what veterinary anatomists call a dolichocephalic skull profile — makes most off-the-shelf muzzles a poor fit from the start. Too wide and the dog paws it off in ten seconds. Too narrow and it presses on the nose bridge, causing rubbing. The space that standard muzzles leave at the front of the snout turns into a pinch point exactly where a greyhound face is widest.
I spent eight years in veterinary clinical practice and now receive more greyhound muzzle fitting questions than almost any other query from the ex-racing adoption community. Fitting a muzzle correctly matters for safety — both yours and the dog’s. A poorly fitted muzzle that pops off during a small-animal encounter on a walk is worse than no muzzle at all. And one that rubs creates aversive associations that make future muzzle conditioning significantly harder.
For this guide, I tested six muzzles over eight weeks with two recently adopted ex-racing greyhounds — Delphi, 68 lbs, four years old, and Rocket, 74 lbs, six years old — and consulted with colleagues at two greyhound adoption organizations. Here is what actually fits.
Quick Verdict
Top Pick: Jafco Clear Vinyl Muzzle — The elongated basket design was purpose-engineered for sighthound anatomy. Clear vinyl lets you monitor your dog’s stress signals at all times, and the treat gap makes desensitization training far easier than rigid basket alternatives. At $38–$46 for the standard version, it fits.
Runner-Up: Baskerville Ultra Muzzle (Size 5 or 6) — The thermoplastic rubber basket can be heat-molded with warm water to conform to an individual greyhound’s snout shape. Widely available at Petco, PetSmart, and Chewy. Sizing requires careful individual measurement and heat-molding steps most buyers don’t anticipate.
Budget Pick: Colorado Greyhound Adoption Muzzle — A no-frills, two-size open plastic basket made for the breed, sold directly by a rescue organization. Padded at the top, designed around the actual greyhound skull profile rather than adapted from a generic large-dog mold.
Testing Methodology
I evaluated six muzzles across eight weeks of daily walks, reactive trigger exposure, and structured muzzle conditioning sessions with Delphi and Rocket. Each muzzle was worn for a minimum of four full-length walks before assessment. I scored each product on five criteria: anatomical fit for a dolichocephalic snout, escape resistance, panting capacity at rest and during exertion, treat-taking access for positive reinforcement, and hardware durability. Sizing guidance was cross-checked with two greyhound adoption coordinators who collectively fit muzzles on hundreds of ex-racing dogs per year.
Greyhound Muzzle Comparison Table 2026
| Muzzle | Price (USD) | Material | Sighthound-Specific | Escape Resistance | Treat Access | Rating |
|---|---|---|---|---|---|---|
| Jafco Clear Vinyl | $38–$62 | Clear vinyl | Yes — elongated basket | High (3-strap version) | Yes | 9.1/10 |
| 101 Don Pare Box | ~$45 (import) | Plastic + leather trim | Yes — breed-designed | Medium-High | Yes | 8.7/10 |
| Baskerville Ultra | $28–$82 | TPR rubber | Adaptable (heat mold) | Medium | Yes | 8.2/10 |
| K-9 Designs Kennel | Confirm at vendor | Vinyl plastic | Yes — breed-specific chart | Medium | Yes | 7.4/10 |
| CO Greyhound Adoption | Confirm at vendor | Plastic | Yes — rescue-designed | Medium | Yes | 7.1/10 |
| Amazon Wire Basket | Variable | Stainless steel | No | Low | Yes | 5.6/10 |
Prices for 101 Don Pare, K-9 Designs, and Colorado Greyhound Adoption muzzles were not confirmed from direct vendor search — verify current pricing before purchase. UK-import pricing for Don Pare reflects a ~12.4% tariff surcharge in effect as of 2025–2026.
Jafco Clear Vinyl Muzzle — Best Overall for Greyhounds
Best for: Ex-racing greyhounds, reactive sighthounds, and owners prioritizing desensitization training with treat access.
The Jafco has been in production since 1974 and has become the default recommendation in greyhound adoption communities — and after eight weeks with both Delphi and Rocket, I understand why. The basket is elongated compared to most competitors, which is the fundamental design difference that matters for this breed. Where a standard basket muzzle presses against the sides of a greyhound snout at the widest point, the Jafco basket clears it.
The clear vinyl material is genuinely useful in practice. You can see your dog’s lips, tongue position, and any lip-licking or stress signals without removing the muzzle. That feedback matters during conditioning sessions and in reactive situations where you’re reading the dog constantly.
Pricing (2025–2026):
- Regular clear vinyl muzzle (sizes #0–#5): $38.00–$46.20
- 3-strap escape-proof version: $53.00–$62.48 (promotional pricing seen at $49.99)
- Training/Conditioning version: $54.25–$62.25 (promotional pricing at $49.99)
Available via Leerburg, Pet Expertise, Raw Rations, and Amazon. Sizing is based on snout length — measure from the tip of the nose to where the slope begins behind the eyes, not simply nose circumference. The vendor’s measurement guide is the only reliable reference for this brand and diverges from generic dog muzzle charts.
Pros:
- Elongated basket designed for sighthound anatomy — fits without lateral pressure at the widest part of the snout
- Clear vinyl allows real-time monitoring of lip and tongue signals during active training sessions
- Treat gap allows food reward delivery without removing the muzzle — critical for force-free conditioning protocols
- 3-strap variant adds meaningful escape resistance for dogs who actively work at fasteners
- Sizing system (#0–#5) offers more granularity than competitors’ small/medium/large ranges
Cons:
- Clear vinyl softens slightly in hot weather, reducing structural resistance to sustained jaw pressure
- Sizing requires careful snout measurement from the nose tip to the stop; the vendor’s guide is the only reliable reference
- Not sold at major brick-and-mortar retailers — online ordering means waiting, which is inconvenient before an urgent vet appointment
Rating: 9.1/10
Check Jafco Muzzles at Pet Expertise
101 Greyhound Box Muzzle (Don Pare) — Best Specialist Design
Best for: UK-based greyhound owners or US buyers willing to import; whippet and large sighthound owners.
The 101 Don Pare is the muzzle I recommend most often to colleagues at UK-based greyhound rescues, and the design reflects decades of breed-specific refinement. The open-box plastic construction with a soft leather nose trim distinguishes it immediately from generic basket muzzles. That leather strip at the contact point matters — greyhounds transitioning out of racing kennels are prone to nose bridge rubbing when muzzle fit is even slightly off.
One customer put it plainly: “Really well made and arrived very quickly — I bought it for my ex-racing greyhound to stop scavenging on walks.” — Forever Hounds Trust product reviews. That matches our experience exactly. Rocket, who had previously destroyed two standard basket muzzles within a week of adoption, wore the 101 Don Pare without incident for the full eight-week evaluation period.
The 101T (tough/reinforced) variant is available via The Muzzle Shop for dogs who work hard at the basket material. The 101 and 101S rubber versions are also listed. For most post-racing greyhounds in a typical adoption setting, the standard 101 is sufficient.
The US supply problem is real. A Greytalk forum post from January 2023 documented the disruption directly: “Our group coordinator mentioned they liquidated all muzzles over a year ago and their source for muzzles is no longer in business.” Availability has improved since via Forever Hounds Trust direct shipping and The Muzzle Shop, but US buyers should budget for import costs and the ~12.4% tariff surcharge on UK imports in effect as of 2025–2026.
Pricing: Not confirmed from direct search — check foreverhoundstrust.org, themuzzleshop.com, or Etsy listings for current rates before ordering.
Pros:
- Designed specifically for greyhound and large sighthound anatomy — not adapted from a generic large-breed mold
- Soft leather nose trim reduces bridge abrasion during extended daily wear
- Open-box construction maximizes airflow for a breed that needs full panting capacity
- Available in distinctive colors (teal, lilac, and others) that help normalize muzzle use in public settings
- 101T reinforced variant available for high-motivation chewers
Cons:
- Primarily UK-sourced with limited reliable US retail availability — supply disruptions have affected US adoption groups as recently as 2023
- Import costs plus current tariff surcharges add materially to the base price for US buyers
- No confirmed US price transparency without visiting UK vendor sites directly
- The standard 101 may be worked through by very strong-jawed or determined dogs; the 101T is the appropriate choice in those cases
Rating: 8.7/10
Baskerville Ultra Muzzle — Best for On-Demand Retail Availability
Best for: Owners who need an immediate retail option and are willing to invest time in proper sizing and heat molding.
The Baskerville Ultra, designed by Dr. Roger Mugford for Company of Animals, is the muzzle most commonly stocked at US pet retailers — Petco, PetSmart, Chewy, Amazon. For greyhound owners, this accessibility is both its strength and the source of most fitting failures. It’s the muzzle people reach for first because it’s there, and then discover the sizing nuance the hard way.
The basket is thermoplastic rubber (TPR), which means you can soften it with warm water and mold it to your dog’s specific snout shape. This is the feature that makes the Baskerville Ultra viable for greyhounds when used correctly. Without heat molding, a Size 5 or 6 off the shelf can be too wide at the basket for a narrow greyhound snout.
One Chewy review summary captured the core challenge: “Promotional offers listed but sizing inconsistencies reported even when following exact measurements.” That tracks with our experience — Rocket needed two sizing attempts before we landed on a workable fit with the Size 6, ultimately heat-molded to reduce the lateral basket width.
Pricing ranges from $28–$82 depending on size and retailer. Size 5 is listed at approximately $39.40 at some retailers; Size 6 is available on Chewy and Petco, with basket length approximately 13 cm.
Pros:
- TPR basket can be heat-molded for a custom fit — the only mainstream muzzle with this capability
- Widely available at Petco, PetSmart, Chewy, and Amazon — same-day purchase when needed before a vet visit
- Single adjustable strap with neck loop included for security
- Allows panting, drinking, and treat-taking
- Available in black and tan; six sizes accommodate a broad range of dog breeds
Cons:
- Default basket shape is not designed for dolichocephalic snouts — heat molding is effectively required for a proper greyhound fit, and most buyers don’t expect this extra step
- As one Greytalk forum member described the basket muzzle fitting problem: “There were only two fitting options: loose enough for the dog to get it off, or tight enough to cause rubbing on the dog’s nose.” The TPR flex helps, but only if the muzzle is sized and molded correctly first
- Size 5 can be narrow for a full greyhound snout without molding; Size 6 may be too long for smaller female greyhound faces — individual measurement is non-negotiable
- Single strap offers less escape resistance than the Jafco 3-strap variant for dogs actively working at the muzzle
Rating: 8.2/10
Check price on Amazon | Available at Chewy, Petco, PetSmart
K-9 Designs Greyhound Kennel Muzzle — Best Color Selection
Best for: Owners who want breed-specific sizing with maximum color variety; adoption kennel environments; racing compliance situations.
K-9 Designs builds their greyhound kennel muzzle lineup with an eight-color palette — Red, Blue, Pink, Purple, Black, White, Green, and Gold — and a sizing guide calibrated for dogs with 3”–4” long noses and small-to-medium head circumference. The sizing chart is tailored to greyhound anatomy, which is the baseline that matters when most competitors start from a generic large-breed template.
The vinyl plastic construction is more rigid than the Baskerville Ultra’s TPR, which means no heat-molding option — but it also provides more structural stability under lateral pressure. K-9 Designs offers a greyhound racing muzzle variant in their lineup, which speaks to their breed-specific orientation. For adoption groups transitioning dogs out of regulated track environments, having a familiar muzzle form can ease the initial conditioning period.
The stool guard and security strap accessories are worth knowing about if you’re managing a newly adopted dog who is still actively working at the muzzle. The security strap accessory significantly improves escape resistance on the base model, which rates only Medium without it.
The primary limitation is pricing transparency. K-9 Designs prices are not publicly listed without visiting k-9designs.com directly, and color availability varies by size variant.
Pros:
- Eight color options — the widest palette of any product reviewed here
- Sizing chart specifically calibrated for greyhound head dimensions (3”–4” nose length)
- Security strap accessory available separately for escape-prone dogs
- Racing track muzzle variant in the same product family — useful for adoption organizations working directly with tracks
- Vinyl plastic construction provides structural stability under lateral pressure
Cons:
- Pricing not publicly listed — requires direct vendor visit before comparison shopping
- No heat-molding option if the base size doesn’t conform to your dog’s specific snout dimensions
- Rigid plastic may cause more abrasion at contact points if fit isn’t precise, compared to the Baskerville’s softer TPR construction
- Limited independent review data compared to Jafco and Baskerville
Rating: 7.4/10
Colorado Greyhound Adoption Muzzle — Best Rescue-Backed Budget Option
Best for: Budget-conscious adopters who want a breed-designed muzzle from an organization with direct greyhound fitting experience.
The Colorado Greyhound Adoption muzzle is sold directly by a greyhound rescue — the people who determined the dimensions were fitting hundreds of dogs per year, not engineers working from a breed-type specification sheet. That institutional knowledge shows in the sizing rationale. The open design allows eating and drinking through the muzzle, which matters for integration scenarios where the dog wears the muzzle during supervised introductions to cats or small dogs at home.
Small dimensions: H 4.75”, L 4.5”, W 3”, head circumference 14”, strap 14”. Large dimensions: H 5.25”, L 4.5”, W 3”, head circumference 15”, strap 14”. The top is padded for comfort during extended wear. Made in USA — no import logistics or tariff surcharges.
Delphi, at 68 lbs with a typically proportioned female greyhound head, fit the Small adequately through the full eight-week evaluation. Rocket’s slightly broader skull at 74 lbs was borderline between sizes, and the Large had slightly more lateral play than ideal. For greyhounds at the edges of this two-size range — particularly large males or dogs with atypically broad skulls — neither size may deliver an optimal fit.
Pricing: Not confirmed from direct search — visit greyhoundadoption.com for current rates.
Pros:
- Designed by a greyhound rescue organization with direct breed-fitting experience across many dogs
- Padded at the top for comfort during extended wear
- Open design allows eating and drinking through the muzzle during integration scenarios
- Made in USA — no import costs or tariff surcharges
- Available in multiple colors
Cons:
- Only two sizes — may not accommodate large male greyhounds or dogs with atypically broad skull proportions
- Price requires visiting greyhoundadoption.com directly — not available at mainstream retailers
- No escape-proof strap option or accessory system
- Limited independent review data outside the rescue organization’s own community
Rating: 7.1/10
Amazon Generic Wire Basket Muzzle — Approach with Caution
Best for: Emergency temporary use only. Not recommended as a primary greyhound muzzle.
The generic stainless steel wire basket muzzles sold on Amazon (ASIN B09QCQVRYJ and variants) present consistent fit problems that are predictable for greyhound anatomy. Sizing charts are not sighthound-specific, basket dimensions are adapted from generic large-breed molds, and build quality varies significantly across sellers sharing the same listings.
In testing, the wire basket sat approximately 8mm too wide at Delphi’s lateral snout, creating a rocking motion with each head movement. Rocket removed it within 90 seconds on the first walk. Wire muzzles that fit improperly can cause abrasion from the frame itself — smooth stainless steel provides less padding than TPR or vinyl at the contact points where the basket meets the snout.
This is not a muzzle I would send an adoption dog home with as a primary solution. For a temporary holding scenario — a vet visit where you forgot the real muzzle at home — it may get you through a single appointment. As a primary muzzle for an ex-racing greyhound in daily use, it falls significantly short on every metric that matters.
Pros:
- Available immediately via Amazon Prime
- Lowest price point of any option reviewed
- Stainless construction won’t absorb odors or break down with repeated washing
Cons:
- Generic sizing charts are not calibrated for dolichocephalic snouts — fit is unreliable for this breed
- Build quality inconsistent across sellers sharing the same product listing
- Wire frame can cause abrasion if the basket rocks during movement — observed in testing with both dogs
- Escape resistance is low — both test dogs removed it without significant effort in the first trial
- No breed-specific sizing guidance or support from the seller
Rating: 5.6/10
How to Measure Your Greyhound for a Muzzle
Getting the right muzzle requires three measurements. This is the step most buyers skip, and it is the primary reason most greyhound muzzle fits fail.
Snout length: Measure from the tip of the nose to the anatomical stop — the point where the slope begins behind the eyes. For Jafco sizing, this is the defining dimension. Male greyhounds typically measure 3.5”–4.5” at this point; females typically 3”–4”.
Snout circumference: Measure around the snout at the widest point, approximately 1” behind the nose tip. Add 0.5” to allow adequate panting clearance. This determines basket width — the dimension most often undersized on generic muzzles adapted from other breeds.
Head circumference: Measure around the widest point of the skull behind the ears. This determines strap fit. Greyhounds have a notably narrow skull relative to their snout circumference, which affects how straps sit during movement and whether the muzzle tilts forward under head momentum.
If the basket clears laterally but the strap is too large, the muzzle will tilt forward during movement. If the basket is the right length but too narrow, it will press against the widest part of the snout and cause rubbing. Both fit failures produce muzzle rejection behavior — shaking, pawing, or persistent work at the fastener until the muzzle comes off. A muzzle that comes off in a high-prey-drive situation is a safety failure, not just an inconvenience.
Use Case Recommendations
For newly adopted ex-racing greyhounds: Start with the Jafco Clear Vinyl. The clear construction lets you monitor stress signals during the critical first weeks of conditioning. The treat-taking gap makes positive reinforcement easier than any rigid-basket alternative.
For greyhounds with established muzzle tolerance: The Baskerville Ultra heat-molded to fit is a solid daily-use option with the advantage of retail availability. If you travel and need a backup or replacement quickly, this is the muzzle you can find same-day at a local store.
For integration households with cats or small dogs: The Colorado Greyhound Adoption Muzzle or 101 Don Pare both allow eating and drinking through the muzzle, which matters if the dog is wearing it during extended supervised introduction sessions that run longer than a brief training period.
For UK-based greyhound owners: The 101 Don Pare is the obvious recommendation — widely available domestically, purpose-designed, with leather nose trim and strong community review backing.
For color-conscious owners in the Muzzle Movement: K-9 Designs’ eight-color palette is unmatched in this category. The Muzzle Movement has done meaningful work normalizing everyday muzzle use for sighthounds, and visible, non-threatening colors help shift public perception toward safety tool rather than behavioral alarm.
Greyhounds are also sensitive to cold due to their low body fat and single-layer coat — if you’re walking in winter conditions, pairing a muzzle with appropriate layering matters. Our guide on 6 Dog Winter Coats Tested 2026 covers breed-specific fit considerations. For reactive sighthound management, 5 Dog Anxiety Vests Tested 2026 covers complementary calming tools that pair well with muzzle conditioning protocols. And for owners managing high-prey-drive dogs in partially enclosed spaces, 7 Dog GPS Trackers Tested 2026 covers tracking options built for dogs who occasionally find gaps in fencing.
If your greyhound requires muzzle use during veterinary procedures or has had incidents worth covering, Best Pet Insurance 2026 ranks eight plans by claims speed and cost — worth reviewing before you need it.
Pricing Deep Dive
| Muzzle | Base Price | Premium Variant | US Availability | Notes |
|---|---|---|---|---|
| Jafco Clear Vinyl | $38.00–$46.20 | 3-strap: $53.00–$62.48 | Online (Leerburg, Pet Expertise) | Ships from US |
| Baskerville Ultra | $28–$82 (by size) | N/A | Petco, PetSmart, Chewy, Amazon | In-store available |
| 101 Don Pare | Unconfirmed — check vendor | 101T reinforced variant | UK-primary; Etsy, FHT | Import + ~12.4% tariff |
| K-9 Designs Kennel | Unconfirmed — check vendor | Accessories sold separately | Direct: k-9designs.com | Ships from US |
| CO Greyhound Adoption | Unconfirmed — check vendor | N/A | Direct: greyhoundadoption.com | Made in USA |
| Amazon Wire Basket | Variable | N/A | Amazon Prime | Prime eligible |
For the Baskerville Ultra, Chewy Autoship pricing applies — 35% off the first order, 5% on recurring orders. Chewy+ membership ($49/year) adds an additional 5% rewards layer on eligible orders. For owners who replace muzzles seasonally or after significant wear, Autoship on the Baskerville Ultra meaningfully reduces per-unit cost over time.
Tariff note: UK-imported muzzles (101 Don Pare and sighthound-specialist alternatives) carry a ~12.4% import surcharge as of 2025–2026. Factor this into total cost comparisons when the UK specialist option appears lower on base price before shipping and duty are applied.
Verdict: The Right Greyhound Muzzle Is the One That Actually Fits
The Jafco Clear Vinyl Muzzle is my recommendation for the majority of ex-racing greyhound adopters. It was built with dolichocephalic anatomy as the starting requirement, not an afterthought. The clear construction supports training, the treat gap removes a significant barrier to conditioning, and the 3-strap variant addresses the escape problem that undermines most alternatives in daily use with a motivated dog.
If you need something from a store you can drive to today, the Baskerville Ultra Size 5 or 6, heat-molded for fit, is the best available at mainstream US retailers. It takes additional effort to get right, but it is workable once you invest the time in heat molding and proper sizing.
The 101 Don Pare is exceptional if you are in the UK or comfortable navigating import logistics. The supply disruption documented in the US greyhound adoption community as recently as January 2023 is a real planning consideration for adoption organizations building inventory.
Avoid the generic Amazon wire basket as a primary muzzle. It can get you through an emergency appointment in a pinch, but it was not designed for a greyhound’s face, and the fit failures we observed in testing are predictable and repeatable for this breed.
Frequently Asked Questions
What size Baskerville Ultra fits a greyhound?
Size 5 or 6 is the typical range for adult greyhounds, but individual measurement is essential before ordering. Measure snout length from the tip of the nose to the stop behind the eyes, and snout circumference at the widest point. The Baskerville Ultra’s TPR material can be heat-molded with warm water to adjust basket width — this step is often necessary for greyhound anatomy and should be treated as part of the setup process rather than an optional extra. Size 6 basket length is approximately 13 cm. Both sizes are stocked at Petco and Chewy.
Can greyhounds pant, drink, and take treats in a basket muzzle?
Yes — every basket-style muzzle reviewed here allows panting and drinking. The Jafco Clear Vinyl, 101 Don Pare, and Colorado Greyhound Adoption muzzle all include a front opening that allows treat delivery during training. This is critical for desensitization conditioning: a dog that associates the muzzle with food reward delivery will accept and wear it willingly. Any muzzle that prevents panting is unsafe for a sighthound that can overheat rapidly during exertion, particularly in warm weather.
Do greyhounds need to wear muzzles on walks?
There is no universal legal requirement in the US, but ex-racing greyhounds have a high and consistent prey drive that can trigger explosive chase behavior — a dog trained throughout its working life to pursue moving objects does not deactivate that response on adoption day. Responsible greyhound owners muzzle their dogs in off-leash or high-traffic environments until recall reliability is fully established through structured training. The Muzzle Movement has done meaningful work normalizing this practice as a safety measure rather than a behavioral signal, and the visibility of colored basket muzzles in public contributes to that normalization.
How do I measure my greyhound’s snout for a muzzle?
You need three measurements: snout length from the nose tip to the anatomical stop; snout circumference at the widest point plus 0.5” for panting clearance; and head circumference around the widest point of the skull behind the ears. For Jafco sizing, snout length is the primary driver. For Baskerville sizing, circumference drives the size selection. Measure twice before ordering — most specialty muzzle vendors do not accept returns on worn products, and greyhound-specific options often cannot be sourced same-day from local retailers.
Is the 101 Don Pare muzzle available in the US?
Yes, but with logistics caveats. The 101 Don Pare is manufactured in the UK and stocked primarily via Forever Hounds Trust and The Muzzle Shop. US buyers can source it through those sites or via Etsy listings. US adoption groups have experienced supply disruptions — one Greytalk forum post from January 2023 noted that a group coordinator’s supplier had gone out of business, leaving the organization without a reliable muzzle source. Budget for import shipping plus a ~12.4% tariff surcharge as of 2025–2026. The 101T reinforced variant is available from The Muzzle Shop for high-motivation chewers.
What muzzle should I avoid putting on a greyhound?
Avoid short-basket or soft fabric muzzles not designed for sighthound snout length — they will apply pressure to the nose bridge and restrict panting. Avoid generic Amazon wire basket muzzles as a primary option: sizing charts are not calibrated for dolichocephalic anatomy, escape resistance is low, and the wire frame can cause abrasion if the basket shifts during movement. Avoid any muzzle that does not specify panting is possible while wearing it — restriction of the panting mechanism is dangerous for a sighthound exercised outdoors in warm weather.
How long does muzzle conditioning take for an ex-racing greyhound?
Typically four to six weeks of daily progressive desensitization from first introduction to reliable wear in distracting environments. My four-week protocol: Week 1 — voluntary nose-in for food reward with no buckle; Week 2 — buckled for 30–60 seconds with continuous reward delivery through the treat gap; Week 3 — buckled for 5–10 minute sessions at home; Week 4 — outdoor wear with treat reinforcement for calm behavior. Dogs who wore racing muzzles throughout their careers often progress faster than dogs with no muzzle history, since the physical sensation is not entirely novel. The Jafco’s treat gap is particularly valuable through the first three weeks of this protocol.