I agree with many posters here. Do NOT get another puppy if you aren't willing to put in the intensive effort to train it. I hope you won't give up on your 6 month old pup and send it away, without working hard with it. It is totally unfair for you to expect it to know how to behave with chickens if you don't put any work into training her.
There is no true breed of dog out there that will automatically know how to behave with chickens. It is all going to depend on you working on it.
It is possible to train a dog to accept your chickens, I did it with 3 Airedale Terriers (who are known hunters of mice, rabbit, snake, squirrels and beavers) but it took a lot of discipline and time from us humans.
I started with the dogs being on leash, and on a DOWN command, allowing them to be close to the chickens, without moving. Train with Down or Sit command with Leave it. These are very important.
Don't attempt to train your dog without a leash in the beginning, using just your voice. You must use the leash first, in case they lunge, you can control them and correct them.
After many hours of training and conditioning, we got to the point where I can leave the dogs outside to guard over the flock while they forage. Altho the property is totally fenced in, we still have hawks once in a while, but if a dog is outside, the hawks won't swoop down.