Черепа волка и различных пород домашней псины:
1 – Airedale Terrier 2 – English Bulldog
3 – Australian Cattle Dog 4 – Collie
5 – German Shepherd 6 – Labrador Retriever
7 – Pug 8 – Chinese Shar Pei
9 – Chihuahua 10 – Border Collie
11 – Australian Shepherd 12 – Dalmatian
13 – Pekingese 14 – Great Dane
15 – Rottweiler 16 – Shetland Sheepdog
17 – Bassett Hound 18 – Boston Terrier
19 – Chow Chow 20 – Dachshund
21 – Great Pyrenees 22 – Staffordshire Bull Terrier (Pitbull)
23 – Saluki 24 – Shih Tzu
25 – Beagle 26 – Boxer
27 – Cocker Spaniel 28 – French Bulldog
29 – Siberian Husky 30 – Poodle
31 – Schnauzer 32 – Wolf