This belief is incorrect. Neutering a pet can eliminate or reduce certain annoying habits that some pets have, but it will not alter the animal's personality. The idea that a neutered pet automatically becomes fat after the operation is also wrong. It is the owner's responsibility to ensure that their pet does not become overweight. Weight is primarily a function of food volume and exercise.
Older pets tend to be less active and often require less, or lower calorie food.
Thre are no benefits to allowing this to occur, however, as mentioned previously, drastic consequences could result. You are visitor to this site since January 12, 1997.