For what it's worth AI is not always used to improve a breed.. it is used very often to control WHEN a cow will calf ( or mare will foal ) and to prevent possible injury to the cow or mare from natural breeding not because of genetic improvement . There is also a BIG difference in what people call improvements. Especially when you are talking horses. I just dont want people out there to think they are ALWAYS getting something better or higher quality just because of AI. I have seen AI used to keep a breed pure only and had nothing to do with any type of improvement.