Hi there- Our broody chicken successfully hatched chicks on Easter, and was a wonderful mama. After staying in the coop with them for weeks, they finally all came out together. We noticed mama seemed "stiff legged" after sitting around for so long with her chicks. She would flap her wings to walk, and sat around with them in a safe corner most days. This went on for weeks. We finally ended up quarantining her because the chicks were old enough to hold their own in the flock, and still are. Mama bird, however, for the most part, has not. We are keeping her in our garden, and in quarantine at night. This has gone on for almost 2 months. She seemed to be getting better for a while, would even run to us and beg to go lay an egg in the coop for a week straight. Now she's back to being lethargic and laying around. She is very unbalanced when standing. We have done vitamin water daily, added crushed up vitamin B, given daily yogurt, and really nothing is helping. I am not certain it is Marek's, because she has had the walking issue since May, and it is now mid-August. Shouldn't Marek's take her quickly?