In my never ending search for border collies, I came with idea that maybe I could breed them. I've bred a different kinds of animals before and I like dogs the most so why now? That way I would always have some available and since I am in a border collie vacuum, puppies might not be so hard to sell. But I'd like to know about the cons of breeding dogs. I've never kept intact adult dogs before. All of my dogs have been neutered. I'd really like to hear about what a dog in heat is like. I know they require diapers but how often andwhat is their behavior like? I had a cat go into heat once right before she was spayed and I can tell you that I never want to have a cat go into heat again! I assume dogs can only be bred while they're in heat but will a boy try to breed a girl all year?