I don't know if any of you have seen the new show Rescue Ink, but the other night they showed something I've never heard of. Apparently there are farms that keep mares to raise racehorse foals. When a valuable racing mare gives birth, the foal is given to a nurse mare to raise so that the racehorse can be bred again as soon as possible. But to keep them lactating the nurse mares have to be bred all the time too. The foals they have are orphaned and usually die or are killed.
I can understand not wanting to put a valuable mare through pregnancy but that's what embryo transfer is for. So is embryo transfer not allowed in racing?