Christa, I doubt you will have to do it for three years. Ripley is the except to every rule. He was so wild my vet wanted to give him female hormones to try to calm him down but I wouldn't do it. One vet told me he has Feline Rage but I don't know much about it. All I know is he would attack me for no reason and pretty much stalked me all the time for the first 2 or 3 years of his life. That is why I waited 10 years before I finally decided that all cats weren't psychotic maniacs and we got a second cat.