Back when I was a lot younger (in my teens) we hunted mule deer out in Colorado every fall. The rancher out there had horses you could shoot off of. Don't know how they were trained but it did happen. I have a dog that cowers in the house when anyone within a mile is shooting. Over the last 3 years he is a bit better about it because after every trip I make out to our range he gits a piece of cheese. Now when I come in from the range he is sitting at the fridge waiting on his cheese. Good luck on the farm purchase. Animals can be trained it just takes time and work.