My chickens are 9 weeks old, and I just moved them into the big coop. My dog is a half lab, half cocker spaniel, and about 9 years old. We've only trained her to come when called and to sit. When they were in the brooder, she would always be sitting near them, staring and listening closely. Now that they're out in the coop, which has been there for about a week, she's been walking around, looking for a way inside. The chickens are still young enough that I can keep them confined in the coop, and we went to great lengths to keep the coop predator proof, but I'd like to let them outside soon. Any advice on how to keep my dog from frightening or killing them would be appreciated.