If you think about it his parents would show him.what to do in the wild ,if u see pere's they get a dead bird and drop.it for th to train on ,get a dummy bunny or a dead rabbit and get him crop up on it a few times then pull it along for him to attack.once he knows what to do
Get a mate and put a dummy/dead rabbit and hide in cover ,then walk along with bird and once in position get him to pull
Also birds have flying weight amd hunting weight but do the first bit first