Hello, I have 5 Colombian Wyandottes that are approximately 10 months old. 4 of them are beautiful, hardy birds that are currently laying. The 5th one, Fiona, used to be one of the most active birds of the flock, but many months ago, in about mid-October to early November, she was struck with some strange illness that still persists to this day. While all of the other chickens are laying eggs and have bright red combs and wattles, Fiona's comb and wattles are pale and small. She is painfully thin, and when I pick her up, she is nothing more than a bag of skin, feathers, and bones. She spends her days lying down and resting and refuses to go outside the coop. She walks with a strange waddle, as if her legs hurt to bend or move. We have wormed her many times with Wazine and Valbazen, and given her another medication meant to treat coccidiosis. Despite all this, she has not improved. She eats and drinks often, and her feces are not watery, bloody, or full of worms. I cannot let her go on sick like this, and I am in need of help to identify what is afflicting her... please help!