Are you planning to try a natural breeding? If so please do some reading.....I have never bred, so I'm no expert, but from what I have read i'm thinking that's not a good idea. On the other point of Kutter getting along with his girlfriend. I think bullies recognize their own kind to an extent and do get along better with other bullies. HRH is calmer around bullies in public where she is quite nervous alone. I don't see her as calm around other types of dogs as she is when we have met with other bullies.