I have a 3 month old BCM pullet, the only one I've ever been able to get my hands on. When I first brought her home at 1 1/2 months old, I put her into quarantine. About a week in she developed a stubborn case of sour crop. It drained her, physically, and I thought I was going to lose her. I tried all of the tricks to get rid of it and as a last resort, when I could see she was getting weak, I pulled the monostat and gave her little bits of that for a couple of days. It worked. I did my best to boost her immunity and health with yogurt and eggs and lots of food and water. She survived the three week quarantine and then I put her out in a chicken tractor in the yard so she could see the other chickens and hopefully recuperate, put on some weight, etc. Well, a couple of weeks later she started stumbling around, seemingly off balance. At first I thought maybe she'd gotten into some moldy feed since it had been raining a lot and the feed that the chickens throw around outside ends up molding on the ground. I've lost young birds to bad feed in the past and was sure she would be dead the next day. But she was the only one affected and she did not die quickly like the others had. She stuck around. It seems degenerative and it's steadily gotten worse. So I figured vitamin deficiency and started giving her B2 and Sav-a-Chick along with the usual yogurt and egg to boost her digestive system after the yeast infection. She's 3 months old now, still not right and slowly getting worse. She prefers to walk on her hocks and sits for much of the day. This morning I noticed the toes on her right leg are staying curled. I've noticed it before but she usually straightens them out when she tries to walk. Now she is trying to walk on them while curled. When she eats, she struggles to swallow too, like the food is getting stuck in her throat and her neck seems to spasm to work the food down. I know that vitamin deficiencies are slow to correct and for a week or so she seemed to be holding steady but this downward trend is frustrating. What am I not doing (besides culling her but I'm considering it)? Is there anything else I can try?