Neutering Side Effects
Our Blackie is about 11 months old and we had him neutered 11 days ago.
We live in the Philippines and most cats are not well cared for, and we did not want him out mingling with the street cats any more than needed. Neutering cats is not common here and most people to not take good care of their pets.
Before the neutering, he did not have any of the bad male habits I have read about. He was sweet (except for the occasional biting of ankles to get attention) and a fairly relaxed cat. He loved to play and when he was alone he would play by himself.
He seems to have healed up fine without any sign of infections, and he eats, drinks, pees and poops fine.
The problem is, after the neutering, he has become a different cat, but quite the opposite of what I thought would happen. He is very hyper-active, and when not asleep, constantly walks and rubs against everything around, and meowing a loud long meow. He rarely meowed before. His eyes are big all the time and he does not want to be held for more than a few seconds, whereas before he liked being held for a long time. We had to keep him inside after the neutering, and he just wants to get out, going to the door, jumping at the windows, etc., etc.
He used to ride in the car to pickup our daughter from school, enjoying the car rides and then enjoying all the kids at the school, all while being very mellow. It looks that will be a thing of the past.
We are sad about this and of course he does not seem happy. It seems like there is an unanticipated hormonal change. Any thoughts on why this happened and will it fade over time?