作者: R T Bronson
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摘要: A retrospective study of necropsy data for 2,002 dogs showed that the mean age at death neutered both sexes exceeded intact dogs, but differences were not significant. wide variation in 56 breeds and cross breeds, 3.0 to 9.9 years, was found. This correlated with breed body weight. An attempt made explain variability by finding diseases which short-lived particularly susceptible. possible general, since samples each small total number from they died so large. Dogs long-lived appropriate their age, cancer, 39% sample. In sample as a whole, cancer accounted 20% deaths 5 years increased remained between 40% 50% 10 16 age.