Also keep in mind that even after he is neutered, it will be a good 6 months before his testosterone levels will be completely down. We just went through a heat period with my female, and my male, who was neutered nearly a year ago, was still very interested (it didn't help that she was nearly throwing herself at him, lol). I have seen males neutered for years who still show interest in females in heat. It is no where near the level it would be if they were entire, but still there, nonetheless. Take hope, though--after the deed is done and his hormones settle down, I doubt that he will try and tear your house apart trying to get to your neighbor's female.