Basic obedience training is very important as is your puppy respecting you. And keeping them on a leash until they understand what their job is when around the chickens is a must.
Depending on the breed your dog may not be dependable/have enough maturity until 2-3 years old, and some dogs are smart enough to take full advantage of the opportunity that when their owner isn't supervising them they will have a go at the chickens even if they seem to ignore them when the owner is present. It all depends on your dog's character.
Our girl is submissive which makes it easy to train her. She knows she is not to touch my birds and I trust her to be in the same room when our hand reared birds are out (that includes our finches). But I wouldn't leave them unsupervised just in case.
All dogs have prey drive but you have to satisfy that drive in constructive ways such as playing fetch, making them search for their food in the backyard, making them find hidden toys/treats, playing tug of war and letting the dog win as that means YOU are providing the satisfying rush they feel when they get the toy so they look to you for a repeat of that feeling, not to other things such as chasing your chickens.
Good luck!