I agree totally with what Bryant said but there are more than one school's of thought on when to breed a dog. With performance dogs of any kind when there is a chance to lose the dog at any time many guys will breed that dog to insure that the blood stays available in case off losing the dog. Others (especially those who don't have unlimited room and resources) will prove out the dog before breeding. If I had a well bred dog from a long line of well bred dogs I personally wouldn't be afraid of breeding it early if I couldn't get another like it. Not sayin either way is the only way but I've seen some guys who were really tickled that they bred that special dog once and then lost em.
I agree with this