thanks for taking in some new babies........Don't worry, I think everything will be a-ok! I have 2 boy kitties and have never had a single problem with spraying (knock on wood). I had them neutered when they were between 5 and six months old - they never sprayed before and they've never sprayed after. As a first time cat owner, I was very pleasantly surprised at how there has never been an accident after coming home at four months of age.
Keep us updated!
Bookmarks