Somewhere else on this forum someone posted about catching and releasing feral cats, AFTER they'd spayed or neutered them. I think if these animals are negatively impacting your home, you have the right to have them spayed. I give you a lot of credit. Someone I know lives in a place with LOTS of barn cats (he feeds them, so they stick around). He called the local shelter and they told him $50 donation per cat was necessary. Since he has something like 12-15 cats living around his house it wouldn't be financially possible for him to do that. So...he'll just keep having more and more cats. I think you're wise to take a proactive approach to this situation, or you could end up in the same boat.
