Canine perinatal mortality: A cohort study of 224 breeds

摘要: Canine perinatal mortality is known to be relatively high. However, the literature on in dogs still sparse and often refers a single or only few breeds. The aim of this large-scale observational study was describe purebred various breeds at both puppy litter level. In addition, influence breed, breed size, age bitch, number season for whelping risk level studied mean size eight days wks after birth calculated. A retrospective cohort performed by studying 10,810 litters 224 registered Norwegian Kennel Club 2006 2007. Perinatal defined as sum stillborn puppies that died during first wk (early neonatal mortality) present 24.6% litters. Eight percent before birth, with 4.3% stillbirth 3.7% early mortality. For most low, but some higher found. 4.97 (±0.02) 4.92 puppies, respectively. Of all born, 1% period from birth. Random effects logistic regression analysis indicated increasing bitch were associated an increased stillbirth, total (P < 0.001). random effect significant outcomes. Litter also had level, highest found Further, doubled puppies. No An interaction existed between three times high (odds ratio = 3.00) bitches having their six y. Breed more important determinant than size. 90% variation individual efforts minimize should targeted management rather