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Table 1 Loss of puppies from birth until 21 days of age in four breeds with a total of 98 litters (l) and 744 born puppies (n): Irish wolfhound (l = 16, n = 121), Leonberger (l = 30, n = 254), Labrador retriever (l = 21, n = 173) and Newfoundland (l = 31, n = 196).

From: Canine neonatal mortality in four large breeds

Age at death Dead puppies n Dead puppies per litter x ¯ MathType@MTEF@5@5@+=feaafiart1ev1aaatCvAUfKttLearuWrP9MDH5MBPbIqV92AaeXatLxBI9gBaebbnrfifHhDYfgasaacPC6xNi=xH8viVGI8Gi=hEeeu0xXdbba9frFj0xb9qqpG0dXdb9aspeI8k8fiI+fsY=rqGqVepae9pg0db9vqaiVgFr0xfr=xfr=xc9adbaqaaeGacaGaaiaabeqaaeqabiWaaaGcbaGafmiEaGNbaebaaaa@2D64@ Mortality % Mortality of live born puppies %
Stillborn 81 0.82 10.9  
0–3 days 29 0.30 3.8 4.4
4–7 days 9 0.09 1.2 1.3
8–14 days 6 0.06 0.8 0.9
15–21 days 2 0.02 0.2 0.3
Sum 127 1.29 16.9 6.9