We have two bitches who are both neutered. I think I'm right in thinking that there is more medical evidence to support the spaying of a bitch, but may be wrong. I couldn't relax at all when Bracken was having a season and it stopped us being able to do some of our normal activities.. For piece of mind I prefer to know that an unexpected litter won't be appearing. She also went through a temprement change when she was in season and when she had her phantom.