Table 1.
Characteristics of dogs (Canis familiaris) used in the present study.
| Breed | Sex | Age (months) | Breed | Sex | Age (months) | |
|---|---|---|---|---|---|---|
| Australian Terrier | ♂ | 62 | Irish Setter | ♂ | 49 | |
| Australian Cattle Dog | ♂ | 54 | Irish Wolfhound | ♂ | 66 | |
| Australian Kelpie | ♂ | 67 | Irish Wolfhound | ♀ | 79 | |
| Basset Hound | ♀ | 49 | Japanese Spitz | ♀ | 12 | |
| Beagle | ♂ | 12 | Miniature Pinscher | ♀ | 12 | |
| Beagle | ♀ | 12 | Miniature Schnauzer | ♂ | 27 | |
| Border Collie | ♀ | 12 | Newfoundland | ♀ | 30 | |
| Boxer | ♀ | 25 | Newfoundland | ♂ | 77 | |
| Boxer | ♂ | 36 | Newfoundland | ♀ | 30 | |
| Bulldog | ♀ | 48 | Norfolk Terrier | ♂ | 12 | |
| Chihuahua | ♀ | 66 | Papillon | ♀ | 13 | |
| Chihuahua | ♀ | 12 | Papillon | ♀ | 12 | |
| Clumber Spaniel | ♀ | 12 | Pug | ♀ | 54 | |
| Dandie Dinmont Terrier | ♂ | UN | Pug | ♀ | 24 | |
| English Cocker Spaniel | ♀ | 17 | Saint Bernard | ♀ | 55 | |
| English Cocker Spaniel | ♂ | 45 | Schipperke | ♂ | UN | |
| English Setter | ♀ | 41 | Shar pei | ♂ | 25 | |
| English Springer Spaniel | ♀ | 40 | Shetland Sheepdog | ♀ | 49 | |
| French Bulldog | ♀ | 17 | Vizsla | ♂ | 39 | |
| French Bulldog | ♂ | 24 | West Highland White Terrier | ♀ | 12 | |
| Greyhound | ♀ | 73 | Yorkshire Terrier | ♂ | 36 | |
| Ibizan Hound | ♀ | UN | UN: Unknown | |||