I have a 2 year old male Bichon Frise, Toby, that I need help with. We also have a 10 year old female cockapoo, Tootsie. Our problem(s) are thus: Tootsie we had spayed at a young age as we did not want her to have puppies or have the risk of getting cancer. The one thing that I did read is that she would have the tendency to gain weight, which she has. Our problem now is Toby. He was not neutered and my wife and I have to watch him like a hawk as he marks every chance he gets, which we are tired of. Also, he jumps up on people, barks when we put him in his pen for any length of time and just does not listen. I would like to know if having him neutered will change his personality and calm him down. He seems to have so much energy most of the time that he becomes uncontrollable.