First time chicken owner & I have only had my chickens 2 days! Some how my dog got in the coop and killed a chicken. I am so upset. These are rescue battery chickens, I feel terrible. What can I do about my dog? How can I train her to leave the chickens alone? I want them to free range in a few weeks. My dog always leaves the regular birds alone when they are in the backyard so I thought she would be fine.