Table 1 Description of the studied population (n = 4971 puppies from 10 breeds)
Breed | Number of puppies included | % of the total population | Number of litters included | Mean birth weight, grams (± SD) | Mean litter size (± SD) | Mean litter heterogeneity, % (± SD) | Sex ratio | Litters with at least one stillborn, % | Neonatal mortality rate |
|---|---|---|---|---|---|---|---|---|---|
Australian Shepherd | 547 | 10.5 | 81 | 363.8 (±82.6) | 7.6 (±2.1) | 28.4 (±14.5) | 1.1 | 27 | 5.5 |
Bichon Frise | 103 | 2.0 | 20 | 180.1 (±35.6) | 6.4 (±1.9) | 25 (±15.9) | 1.1 | 21 | 24.3 |
Cocker Spaniel | 779 | 14.9 | 147 | 262.6 (±59.4) | 5.7 (±1.9) | 25.1 (±13.6) | 1.0 | 23.9 | 6.5 |
German Shepherd | 281 | 5.4 | 35 | 513.7 (±90.8) | 7 (±2.9) | 19.1 (±11) | 1.0 | 35.7 | 7.8 |
Golden Retriever | 588 | 11.2 | 79 | 394.8 (±76.8) | 7.8 (±2.8) | 25.4 (±12.7) | 1.0 | 39.1 | 7.3 |
Labrador Retriever | 1903 | 36.4 | 262 | 409.9 (±69.2) | 7.8 (±2.7) | 23.2 (±11.2) | 0.9 | 33.8 | 6.2 |
Maltese | 166 | 3.2 | 37 | 161.9 (±34.2) | 5.1 (±1.8) | 23.6 (±13.1) | 1.2 | 22.9 | 15.7 |
Rottweiler | 111 | 2.1 | 16 | 403.8 (±58.6) | 8.2 (±2.4) | 24.3 (±14) | 1.4 | 37.5 | 18.9 |
Shih Tzu | 270 | 5.2 | 58 | 175.5 (±27.9) | 5.3 (±2.1) | 17.8 (±9.4) | 1.1 | 23.5 | 16.7 |
West Highland White Terrier | 223 | 4.3 | 49 | 192.1 (±36.3) | 5.3 (±1.6) | 21.5 (±13.2) | 1.1 | 28.6 | 11.2 |
Total | 4971 | 784 | 350 (±116.2) | 7.1 (±2.6) | 23.7 (±12.7) | 1.0 | 31 | 8.2 |