Will you guys definitely get Gus neutered? I think that is the key to everything here although neutered cats can still spray. Ripley has only sprayed in the house a couple of times and that was due to stress of a new cat in the house, new carpet and paint and when we opened the windows to air out the paint he could smell where a neighbor's cat had sprayed outside. I couldn't really blame him - I was so stressed to I could have sprayed, LOL!