We are new to owning chickens, we only bought 6 hens about 3 months ago at around 22 weeks of age. Most have been healthy, happy and laying eggs (which is the good part) but one of the girls is not doing as well. We took her to the vet and she has given us antibiotics for a sore leg the chicken has. symptoms: not eating, not drinking, lethargic, sore leg, not laying eggs, small and pale comb. positive signs: alert, chirps, no physical signs of illness, no fleas or mites, can stand up. She is in no sign of pain, does not cry or chirp much, only started having yellow runny poo a few hours after we gave her first dose of antibiotics, before that, poo looked normal. The 5 other chickens are perfectly happy, healthy and eat plenty. Extra info: They have a large chicken coop with indoor nesting boxes and roost, with an indoor/outdoor chicken run with lots of roaming space and an extra run for scratching around in the dirt. I'd appreciate any suggestions or thoughts. We are very worried. - Thanks in advance!!