One of my new marans pullets (3 mnths old ish) has been acting very strangely. It's always very sluggish and almost always has it's eyes closed. I've seen it eat and drink normally, and I looked it over and couldn't find anything suspicious. But if it is still for more than 10 seconds, it closes it's eyes and kind of drifts off. When I approach it, it opens it's eyes and will walk away from me, but it is very slow and almost walks like it has to poop all the time. But it pooped twice in about 3 minutes, so i don't think anything is stuck up there. I put it up on a platform to watch it, and it almost immediately hunched down and closed it's eyes. When i touched it, it slowly got up, looked around, then slowly walked right off the edge of the platform like it couldn't see. I thought it may be blind, but it seems to respond to my hand when i wave it around it, and it did walk right up and get some water. Then hunched down right where it was, closed it's eyes, and purred. It is the strangest thing, it's not normal behavior, but it doesn't seem to be in pain, and I can't find anything wrong. All of my marans pullets are very quiet and docile, but this is different. Any ideas would be great! I bought 3 pullets off craigslist about 10 days ago. I have them quarantined, and besides being almost silent, all seems well except for this girl. What could it be??