In fact, the best time to spay your female dog or cat is before their first heat. It's better for your female pet to be spayed at a young age because spaying prevents uterine infections that often occur later in your pet's life. And, it eliminates unwanted crowds of males from harassing your pet. The operation costs too much. And certainly, in the long run, the price of this operation is much cheaper than caring for litters, or for medical problems that can be avoided by spaying or neutering.
Pets become fat and lazy after being spayed or neutered.
Fat animals are usually overfed and under exercised. It's true there can be a tendency for a pet to put on some weight after the operation. But what is not true is that the operation causes the condition. Male dogs and cats, in particular, will roam less and burn fewer calories. A pet's behaviour changes dramatically after surgery.