S/M 

Chihuahua, Yorkie, Maltese, Beagle, Pekingese, Boston Terrier, Cocker Spaniel, Pomeranian, Toy Breeds and Puppies

M/L

Retrievers, Labradors, Dalmatian, Bull Terrier, Springer Spaniel, Schnauzer, Bulldog, Boxer, German Shepard, Pit Bull, Weimaraner