OK, a little background before I begin. Last year, I adopted two cats, a brother and sister who were about 3 years old ( Peety and Piglet). That is fine, they are very laid back and relaxed. About a month ago, I found an abandoned cat (Bob). When I took him in, he was very thin and neglected. He seemed to be just like my other two, just wanted to sleep all the time and was very content with his life : ). However, about one week ago, he started have psycho attacks. He went from being laid back to acting like a kitten. The vet told me he is about 4 years old. He know runs around the house, jumps on my other two cats to get them to play, he knocks over EVERYTHING while he is "playing". I have never had to cat proof my house before! He is like a totally different cat! I am taking the change to be that he is well fed, has energy now, is healthy and happy so he is expressing his happiness? Anyone have any suggestions as to why the sudden change? It's like Dr. jeckle and mr. hyde!