If u ever have a chance to experience this give it a try , I got a video but having trouble posting it , I work with the falconer and he always talks about it so I invited him to my property and my daughter wants one
I looked closely at this some years ago. I learned real quick that having a bird is like having a child. They take up a lot of time, and it takes a lot to care and tend to them !! They ain't like a dog you just feed and take him out of the kennel when you want !! It is a very interesting and a enjoyment to watch them work and achieve their goals !!
The guy that I went with lives rt outside of Newnan, and is as nice a man you'll ever meet , he even offered to take his bird to my daughters school and do a demonstration for a school project , he loves to take kids especially , probably because he lost his only son to cancer , if u want pm me your name and number and I'll get him to give u a call , I'd love to go again also !
I doubt it has anything to do with training. They are still wild animals. My guess is they probably go somewhere else for both training and hunting so the bird never has an opportunity to go for the chickens.