Hello, I need help! A while ago I posted about a chick I had that got attacked by another hen (or at least I assume so since it was not moving and in the nest box with another hen. I did not see the attack happen. I just assumed that was what occurred.) She seemed to perk up after two days of being semi-lethargic. Lately, I've noticed she is not growing. She is still small and does not really keep up as well as the other chicks, although she is still perky enough to run around with them. Today, I witnessed for the first time this chick suddenly peeping loudly and scurrying in a circle, banging into anything that came within that circumference. She did this three times in a row then collapsed. I picked her up, held her for a while. After breathing heavily for a bit she then seemed to perk up and was fine. I have noticed her walking on her haunches too. She doesn't seem to eat very much either but she will put her nose down to eat. Its like she mock eats. I have looked into her eyes before and thought they were kind of odd, but I chalked this up to her being a breed I am not familiar with. Now, I'm new to chickens. This was my first hatch here at my coop. I did not get them vaccinated. I did not know anything about Mareks. I read that it is so common and very deadly. I am more worried right now about the other two chicks I have (also the same age) and also my flock of 7 hens. I want to keep them safe.. if that is even possible now... IF it really is Mareks. Where do you get your chick's vaccinated? Is there anything else I should get them vaccinated for? Also, do you think my 7 hens were vaccinated? I got them at a feed store and I think they got them from one of the two major chick factories that I do know have the vaccination option. I would assume that they were since I have never had any problems that seem like Mareks and I do not know why a feed store would even take the chance of not vaccinating them. Can anyone help me know what to do at this point? The chicks have been in contact with the other hens now. No attacks, although I did see one hen strike the head of one chick but it didn't seem hard or harsh. The peep just peeped loudly and ran to mama. Should I separate this little chick? Should I contact the breeder I got the fertilized eggs from? What do I do at this point? Are there other maladies that could be effecting the chick? Is this running in a circle bit mostly caused by Mareks? The chick is a 4 week old Easter Egger.