My girl understands "BE NICE TO CHICKENS." She is highly intelligent and her DNA to protect means my entire family whether chicken or human. I'm seeing that people have different experiences but if you just go with giving the dog the job it wants, I think it works out. Put some time into it and the reward it big. No big training sessions or dog whisperers needed. Just the right balance of job, reward, oversight. All of that said, when chickens are milling about as normal, no dog really cares. It's when they "run" that the prey drive kicks in. You have to correct the response to the chicken running, lol.