i have a flock of 6 girls. one stopped roosting at night so we put her up on the roost with her sisters when i close them up. she has gotten really light compared to the 2 other girls her age. They are about 20 weeks old. one of the other chickens her age pecks the other 2 sometimes. i dont know if she pecked her in the eye or something but when she trys to eat she always pecks like an inch to the left. Today, i noticed a few red chicken poops in the coop altough i dont know if it is from her. When they free range, she trys to keep up but soon loses the others. Whats wrong with her?