All of my male cats have been neutered. Never changed their personality or their energy level.Thank you, I would hate to lose any of the kittens, so I'm prepared to go to any length. I'll see if the mother can be cought and spayed. I spay all my female cats but don't neuter the males, ever since I saw a neutered male that was so overweight and had no energy for anything. The owner said his character has changed since.