I have 4 hens, and 6 eleven week old chicks. One or two of the hens won't leave my favorite chick alone. They peck her butt till she's raw and bleeding. We took the chick out and let her heal. Then we put blue kote on her bum to hopefully stop further pecking till she completely heals up. Didn't work. That hen just keeps attacking her! So this time we tried pine tar. The day after we applied it she was getting pecked again. I can't keep sleeping with this chick in my room (she's noisy) and I'm not going to get rid of her. What should I do?