Baskerville Ultra Muzzle Breed Guide. Sizes are available in 1 - 6 and are for typical adult dogs & bitches. Juveniles may need a size smaller. ‡ = not recommended. The number next to the breeds below is the recommended size. Boston Terrier ‡ Bulldog ‡ King Charles Spaniel ‡ Lhasa Apso ‡ Pekingese ‡ Pug ‡ St Bernard ‡ Shih Tzu ‡ Afghan Hound 5 Airedale 5 Alaskan Malamute 5 American Cocker 2 American Staffordshire 6 Australian Cattle Dog 3 Australian Shepherd 3 Basenji 2 Basset Hound 5 Beagle 3 Bearded Collie 3 Bedlington Terrier 2 Belgian Shepherd 5 Bernese MD 5 Bichon Frisé 1 Border Collie 3 Border Terrier 2 Borzoi 5 Bouvier 6 Boxer 6 Briard 5 Brittany Spaniel 5 Buhund 2 Bull Mastiff 6 Bull Terrier 5 Cairn Terrier 2 Cavalier Spaniel 2 Chow Chow 5 Chesapeake Bay Retriever 5 Cocker (English) 3 Corgi 3 Dachshund Miniature 1 Dachshund Standard 1 Dalmatian 4 Dobermann 5 Elkhound 4 English Setter 5 Flat Coated Retriever 5 Foxhound 5 Fox Terrier 2 German Shepherd 5 Golden Retriever 5 Gordon Setter 5 Great Dane 6 Greyhound 5 Hungarian Vizsla 3 Irish Setter 5 Irish Water Spaniel 3 Irish Wolfhound 6 Jack Russell 2 Japanese Akita 6 Keeshond 3 Kerry Blue Terrier 4 Labrador Retriever 5 Lakeland Terrier 2 Lurcher 5 Maltese Terrier 1 Maremma Sheepdog 5 Mastiff 6 Munsterlander 5 Newfoundland 6 Norfolk/Norwich Terrier 1 Old English Sheepdog 5 Papillon N/A Pharaoh Hound 5 Pit Bull 6 Pointers 4 Poodle Toy 1 Poodle Standard 3 Pyrenean MD 6 Ridgeback 5 Rottweiler 6 Rough Collie 3 Saluki 3 Samoyed 4 Schnauzer Miniature 2 Schnauzer 3 Schnauzer Giant 6 Scottish Terrier 3 Sheltie 2 Shiba Inu 2 Siberian Husky 5 Soft Coated Wheaten 4 Springer Spaniel 4 Staff Bull Terrier 6 Weimaraner 5 Welsh Terrier 3 West Highland White 2 Whippet 2 Yorkshire Terrier 1 .