MO4-HGirl, You just got the dog and allowed him the opportunity to kill your chickens? As an Advisor, I am going to help you see that this mistake was on YOU, not the dog. You need to train the dog, any dog. It is unfair for you to put him in this situation with no training and then be disappointed that he doesn't magically know what your expectations are.
Chickens are AWESOME toys for dogs! Chickens move quick, they smell fabulous (to a dog), they are noisy, they flap their wings, run, fly. They are the perfect prey! Can't blame a dog for being a dog. But, you can teach them!
Set your dog up for success. The dog should be around the chickens with no opportunity to harm them (on a lead). Slowly work with your dog to give him an opportunity to learn how to please you, how to be successful at his job.
Look into your 4-H dog program. Learn how to communicate with your dog. You'll be amazed at what you can teach that dog to do!