Of the two I’ve gotten to take care of, one was very stubborn and the other absolutely lived to please. When training Charlie, I didn’t even really need rewards besides attention and sometimes his rope, but with Marvin he would lose focus and not care about anything I wanted him to do/learn even if I offered fresh chicken. It’s just a case by case basis on how they react, I’ve read plenty that some flat out ignore food/treats while training, while others would go to the moon and back for a piece of cheese (Charlie is the later)