I'd love to see a photo of these!
On the prey drive bit...I have four dogs; three Mastiffs and a Great Dane. The Dane has a much, much higher prey drive than the other three, but he managed to get two of the other three to join him in killing my birds when the opportunity presents itself. Levi, the Dane, loves squeaky toys. The big, warm ones are more fun than the cold small ones I buy at the pet shop. When it stops squeaking, just go grab another if possible!
We've opted to quit raising turkeys because of that puppy, and have done some fence work on the chickens. Since I have bottle baby goats, I've come to the conclusion that it will be some time before they can be on pasture unsupervised, unless Levi is indoors and crated. I could never fully trust training on him with the extremely high prey drive he's exhibiting. The Mastiffs though, I'd retrain if I didn't have to find alternatives because of Levi anyway.
Animal interactions are amazing, as are what characteristics we've enhanced in the breeds we have spent centuries artificially selecting. I love it. (As long as my flocks stay protected for that puppy of mine!)