How long after spaying or neutering does a cat gain weight?

After neutering, a cat’s hormone levels and metabolism drop, so on the same diet it gains weight more easily; exactly when depends on its diet. However, male cats may first get thinner and then gradually gain weight. To prevent obesity, the owner should adjust the diet and provide appropriate exercise after neutering.

Obesity in cats easily leads to heart disease, diabetes, and other conditions, so the owner should control the cat’s weight.