I think that is a mistake I saw a lot of breeders in the dog show world do. If you are going to another breeder, you should be going to get something specific that your stock lacks. When you raise them up, you may find they do not have the qualities that are strong in your own stock, so you may want to cull them, which I think is a mistake. If you go outside, you go for a purpose. When that chick/dog doesn't have what you have in abundance in your own stock but has the quality you are looking for, you breed back into your stock to fix the fault the new line brought in. That way you keep what you have and add the new qualities some other breeder has. It's a form of kennel blindness I saw in dog breeders, an intolerance for certain faults that are not in their own lines, but a tolerance for the faults of their own dogs. They would then breed to a dog that had the qualities their stock lacked, but also brought in the faults of that other line, which many breeders couldn't live with. A friend of mine who is a genius at breeding dogs explained it to me. I swear he could start with a pair of Great Danes and end up with championship miniature Dachshunds within 20 years if he wanted to, he was that good.
