I noticed how everybody jumped on this thread and telling her to secretly get her spayed behind his back. I'm going to offer my two cents. I wouldn't do that because that would be a betrayal of trust between the two of you. He actually came to you and told you upfront he is going to breed her. If I were you, I'd tell him upfront that you'd prefer her not to get bred. Think about it, spaying/neutering are all major surgeries and have been shown to cause serious health issues. In males for example, the risk of osteocarcoma triples. Now about it's my dog, it's our dog, it's his dog, etc. I believe a dog belongs to NOBODY but the person he chooses to follow. Anybody can buy a dog, but the dog does not belong to you. The dog only has one true master and that master, the dog alone chooses. I would do what's best for the dog. I would not spay a female just because somebody wants to breed her. Think of the major health implications. Along with this, would you really want a dog to come between you two? Seriously, that would be a breach of trust, much like him cheating on you. I would not do anything drast and while I respect the other members for voicing you to spay her immediately (I believe that was a bit rash though), I would sit him down and talk to him. Remember, she's the one that chooses who's the owner. If she chooses both of you (I'm guessing she does), than both of you will have to discuss this like adults. Don't be like little kids and doing anything underhanded or anything that will affect your relationship as well. This is just my two cents. Here are some points to take into consideration: Health of your dog. Conformation wise. Reasons he's breeding. etc. Take these into considerations and tell him your side of the story. There are two sides to every coin. Also note the talk of BSL, how BSL is unconstitutional for it infringes on our right to own our choice of breed. Well aren't you guys infringing on his right's to breed his dog? I know that if someone were to say I couldn't breed my dog or to anyone of my hog dogger friends, they'd laugh at your face and still breed them as they are hog doggers and they are breeding to improve their program. Just don't do anything rash and do what couples do best, sit down and talk about it like responsible adults. Just my two cents