I have a year old RIR who got very sick around Thanksgiving. She was emaciated, had sour crop, was losing feathers, and was stumbling. The good news is that with a lot of TLC the sour crop has resolved, her feathers are coming in nicely, she's put on weight and is even laying an egg daily. But the stumbling, rolling and circling are still the same. We have her in a big dog crate in the garage. We let her out to exercise daily, but it is distressing to see her do somersaults when she bends forward to peck at something. She seems to be in good spirits, but I want her to get well enough to go back to the coop with the flock. I am assuming she has an inner ear infection. Vitamin c, msm, grapefruit seed extract, kelp have not helped. What should I be using? Have any of you had this issue and what worked for your chicken?