| S | Airedale Terrier | 1.5" |
| M | Airedale Terrier (over 60 lb) | 1.5" |
| M | Akita | 1.5" or 2" |
| L | Akita (over 100 lb) | 1.5" or 2" |
| M | Alaskan Malamute | 1.5" or 2" |
| L | Alaskan Malamute (over 80 lb) | 1.5" or 2" |
| M | American Bulldog | 2" or 1.5" |
| L | American Bulldog (over 73 lb) | 2" or 1.5" |
| M | American Bully | 1.5" or 2" |
| L | American Bully (over 85 lb) | 1.5" or 2" |
| M | American Staffordshire Terrier | 1.5" or 2" |
| L | American Staffordshire Terrier (over 55 lb) | 1.5" or 2" |
| L | Anatolian Shepherd | 2" or 1.5" |
| S | Australian Cattle Dog | 1.5" |
| M | Australian Cattle Dog (over 42 lb) | 1.5" |
| S | Australian Shepherd | 1.5" |
| M | Australian Shepherd (over 48 lb) | 1.5" |
| S | Basenji | 1" |
| M | Basset Hound | 1.5" or 2" |
| L | Basset Hound (over 57 lb) | 1.5" or 2" |
| S | Beagle | 1" or 1.5" |
| M | Belgian Malinois | 1.5" or 2" |
| L | Belgian Malinois (over 67 lb) | 1.5" or 2" |
| M | Bernese Mountain Dog | 1.5" or 2" |
| L | Bernese Mountain Dog (over 92 lb) | 1.5" or 2" |
| S | Bichon Frise | 1" |
| Not recommended | Biewer Terrier | |
| L | Bloodhound | 2" or 1.5" |
| L | Boerboel | 2" |
| S | Border Collie | 1.5" |
| M | Border Collie (over 38 lb) | 1.5" |
| Not recommended | Border Terrier | |
| M | Borzoi | 1.5" or 2" |
| L | Borzoi (over 82 lb) | 1.5" or 2" |
| S | Boston Terrier | 1" |
| L | Bouvier des Flandres | 2" or 1.5" |
| M | Boxer | 1.5" or 2" |
| L | Boxer (over 70 lb) | 1.5" or 2" |
| S | Boykin Spaniel | 1" or 1.5" |
| S | Brittany | 1" or 1.5" |
| Not recommended | Brussels Griffon | |
| S | Bull Terrier | 1.5" |
| M | Bull Terrier (over 57 lb) | 1.5" |
| L | Bullmastiff | 2" or 1.5" |
| Not recommended | Cairn Terrier | |
| L | Cane Corso | 2" or 1.5" |
| S | Cardigan Welsh Corgi | 1" |
| S | Catahoula Leopard Dog | 1.5" |
| M | Catahoula Leopard Dog (over 72 lb) | 1.5" |
| S | Cavalier King Charles Spaniel | 1" |
| S | Cavapoo | 1" |
| M | Chesapeake Bay Retriever | 1.5" or 2" |
| L | Chesapeake Bay Retriever (over 68 lb) | 1.5" or 2" |
| Not recommended | Chihuahua | |
| Not recommended | Chinese Crested | |
| S | Chow Chow | 1.5" |
| M | Chow Chow (over 58 lb) | 1.5" |
| S | Cockapoo | 1" |
| S | Cocker Spaniel | 1" or 1.5" |
| M | Collie | 1.5" or 2" |
| L | Collie (over 62 lb) | 1.5" or 2" |
| S | Corgi | 1" |
| Not recommended | Coton de Tulear | |
| S | Dachshund | 1" |
| M | Dalmatian | 1.5" or 2" |
| L | Dalmatian (over 62 lb) | 1.5" or 2" |
| M | Doberman | 2" or 1.5" |
| L | Doberman (over 73 lb) | 2" or 1.5" |
| L | Dogo Argentino | 2" or 1.5" |
| L | Dogue de Bordeaux | 2" or 1.5" |
| M | English Bulldog | 1.5" |
| L | English Bulldog (over 45 lb) | 1.5" |
| S | English Cocker Spaniel | 1" or 1.5" |
| L | English Mastiff | 2" or 1.5" |
| S | English Setter | 1.5" |
| M | English Setter (over 62 lb) | 1.5" |
| S | English Springer Spaniel | 1.5" |
| M | English Springer Spaniel (over 45 lb) | 1.5" |
| M | Flat-Coated Retriever | 1.5" or 2" |
| L | Flat-Coated Retriever (over 65 lb) | 1.5" or 2" |
| S | French Bulldog | 1" |
| S | Frenchton | 1" |
| M | German Shepherd | 2" or 1.5" |
| L | German Shepherd (over 63 lb) | 2" or 1.5" |
| M | German Shorthaired Pointer | 1.5" or 2" |
| L | German Shorthaired Pointer (over 62 lb) | 1.5" or 2" |
| S | German Wirehaired Pointer | 1.5" |
| M | German Wirehaired Pointer (over 60 lb) | 1.5" |
| M | Giant Schnauzer | 1.5" or 2" |
| L | Giant Schnauzer (over 70 lb) | 1.5" or 2" |
| M | Golden Retriever | 2" or 1.5" |
| L | Golden Retriever (over 62 lb) | 2" or 1.5" |
| S | Goldendoodle | 1.5" |
| M | Goldendoodle (over 60 lb) | 1.5" |
| L | Great Dane | 2" |
| L | Great Pyrenees | 2" or 1.5" |
| L | Greater Swiss Mountain Dog | 2" or 1.5" |
| M | Greyhound | 2" or 1.5" |
| L | Greyhound (over 65 lb) | 2" or 1.5" |
| S | Havanese | 1" |
| M | Irish Setter | 1.5" or 2" |
| L | Irish Setter (over 65 lb) | 1.5" or 2" |
| L | Irish Wolfhound | 2" |
| Not recommended | Italian Greyhound | |
| S | Jack Russell Terrier | 1" |
| S | Keeshond | 1" or 1.5" |
| M | Labradoodle | 1.5" or 2" |
| L | Labradoodle (over 65 lb) | 1.5" or 2" |
| M | Labrador | 2" or 1.5" |
| L | Labrador (over 63 lb) | 2" or 1.5" |
| S | Lagotto Romagnolo | 1" or 1.5" |
| L | Leonberger | 2" |
| S | Lhasa Apso | 1" |
| S | Maltese | 1" |
| Not recommended | Maltipoo | |
| S | Mini Poodle | 1" |
| S | Miniature American Shepherd | 1" |
| S | Miniature Pinscher | 1" |
| S | Miniature Schnauzer | 1" |
| L | Newfoundland | 2" |
| S | Nova Scotia Duck Tolling Retriever | 1" or 1.5" |
| M | Old English Sheepdog | 1.5" or 2" |
| L | Old English Sheepdog (over 80 lb) | 1.5" or 2" |
| M | Olde English Bulldogge | 1.5" |
| L | Olde English Bulldogge (over 65 lb) | 1.5" |
| Not recommended | Papillon | |
| Not recommended | Pekingese | |
| M | Pit Bull | 1.5" or 2" |
| L | Pit Bull (over 80 lb) | 1.5" or 2" |
| S | Pomeranian | 1" |
| S | Portuguese Water Dog | 1.5" |
| M | Portuguese Water Dog (over 48 lb) | 1.5" |
| L | Presa Canario | 2" or 1.5" |
| S | Pug | 1" |
| S | Puggle | 1" |
| S | Rat Terrier | 1" |
| L | Rhodesian Ridgeback | 2" or 1.5" |
| L | Rottweiler | 2" or 1.5" |
| L | Saint Bernard | 2" |
| S | Samoyed | 1" or 1.5" |
| S | Scottish Terrier | 1" |
| M | Shar Pei | 1.5" or 2" |
| L | Shar Pei (over 52 lb) | 1.5" or 2" |
| S | Shetland Sheepdog | 1" |
| S | Shiba Inu | 1" |
| S | Shih Tzu | 1" |
| M | Siberian Husky | 1.5" or 2" |
| L | Siberian Husky (over 52 lb) | 1.5" or 2" |
| S | Soft Coated Wheaten Terrier | 1" or 1.5" |
| S | Staffy | 1.5" |
| M | Staffy (over 29 lb) | 1.5" |
| M | Standard Poodle | 1.5" or 2" |
| L | Standard Poodle (over 55 lb) | 1.5" or 2" |
| S | Standard Schnauzer | 1" or 1.5" |
| S | Toy Poodle | 1" |
| M | Vizsla | 1.5" or 2" |
| L | Vizsla (over 55 lb) | 1.5" or 2" |
| S | Weimaraner | 1.5" |
| M | Weimaraner (over 67 lb) | 1.5" |
| S | West Highland White Terrier | 1" |
| S | Whippet | 1.5" |
| M | Whippet (over 32 lb) | 1.5" |
| S | Wirehaired Pointing Griffon | 1.5" |
| M | Wirehaired Pointing Griffon (over 52 lb) | 1.5" |
| Not recommended | Yorkshire Terrier | |