Читаем:The balance of long-term health risks and benefits of spay/neuter will vary from one dog to the next. Breed,age, and gender are variables that must be taken into consideration in conjunction with non-medical factorsfor each individual dog. Across-the-board recommendations for all pet dogs do not appear to besupportable from findings in the veterinary medical literature. ...For female dogs, the situation is more complex. The number of health benefits associated with spaying mayexceed the associated health problems in many (not all) cases. On balance, whether spaying improves theodds of overall good health or degrades them probably depends on the age of the dog and the relative riskof various diseases in the different breeds. Вам перевести?