I've tried to be a really good BYC forum member and search/read through all of the Mareks posts but none seem to describe what I am seeing. 1) What type of bird , age and weight (does the chicken seem or feel lighter or thinner than the others.): EE mutt. FIVE weeks. Weight unknown - same size as clutch mates. CHick came from an old fashioned brooding from a hen & rooster that I own. 2) What is the behavior, exactly: It moves around "shaking" as if it has Parkinson's. Shaking appears to come from legs. 3) How long has the bird been exhibiting symptoms? I would say 3-4 days. 4) Are other birds exhibiting the same symptoms? No. 5) Is there any bleeding, injury, broken bones or other sign of trauma. No. 6) What happened, if anything that you know of, that may have caused the situation. I am having a hard time keeping their coop clean of all the poop from 12 chicks. Last week cleaned it out very well, spread out a lot of ag. lime, laid pine shavings for the first time. (Before was dirt in a horse stall) 7) What has the bird been eating and drinking, if at all. Eating, drinking, and running about as normal. Medicated starter feed, of course. 8) How does the poop look? Normal? Bloody? Runny? etc. I have 12 chicks in their stall-coop & 10 more they mingle with. (all from the same family. No new birds brought in/introduced) N0 idea whose poop belongs to whom. 9) What has been the treatment you have administered so far? None. 10 ) What is your intent as far as treatment? I would like to treat myself - have a 4H Poultry leader that could help. 11) If you have a picture of the wound or condition, please post it. It may help. A picture would not help with this. 12) Describe the housing/bedding in use: Until a week ago WAS dirt that was in a horse/steer stall that had not been used in 15+ years for a steer/horse. Basically Florida dirt-sand. Last week I shoveled out/scraped out all the poop and spread lime and then pine shavings. My thoughts: Mareks? Problems from the lime? Problems from sometimes the chick poop falling into feeder and perhaps said chick ingested this poop? Have yet to come across moldy feed or wet feed. **Yesterday it had a pine shaving stuck to the bottom of its foot and I thought this was the problem. I pulled it off (was not easy) and held/looked over the chick for a while. I did not notice any visible issues. The shaking does seem to be worse. I will have to isolate tomorrow. ANY thoughts will be taken to heart & greatly appreciated.