I have three ex battery hens, daffodil the smallest, is sick. I've had the girls for about eight months. Last Tuesday I came home and daffodils comb was blue/black she couldn't hold her head or her wings up. Panicked I rushed her to the vets, who were very vague, they gave me antibiotics. I separated her and she had 7 days of antibiotics and appeared back to her usual self. I re introduced her, and four days later she is starting to look sick again, I've separated her again and restarted the antibiotics, I'm not sure what's wrong or what else I can do? Thanks.