A friend of mine was given a 2 year old Silkie hen with unknown illness because she had the time to care for the bird. History: The bird began looking weakened and unstable about two weeks ago. She was given Sulfadiomothoxine for 5 days and with no improvements on strength, the bird was given Baytril for 7 days. in the last week the bird has become so weak she cannot stand, and she has to be tube fed. She called me to come look at the bird yesterday and this is what I observed: Both legs are weakened so that they cannot support her weight, she looks also like she has mild wry neck. When I picked up the bird, her abdomen seemed large for a bird that cannot feed itself. It was slightly squishy and hot, she leaked a clear mucous out of her vent when I picked her up. She told me that she only seems to poop when she is picked up, almost like she needs help pooping and she said it seemed as if the bird was in pain when pooping. She has been eating Exact parrot feed exclusivity for about 6 days. The bird doesn't have mites, or signs of cocci. I was thinking a possible deficiency because the bird does not receive very little/ if none at all, sunlight. So Vitamin D deficiency? But the legs could mean Marek's? Or the abdomen could be EYP? I am stumped.