We recently got thirteen chicks of various breeds. Sadly, two of them died within the first week so now there's only eleven. They are about 2-3 weeks old now. I noticed this morning that one of them was wobbling around kind of funny, like she couldn't use her left leg. She would never stand straight up and she would occasionally lean on her wing for balance. I might add that this particular chick has always been the biggest and most energetic one of them all, and she still has lots of energy, she just can't move right. Well this afternoon I noticed that one of the other chicks was having the exact same problem. I did some research and it sounds like Marek's disease to me. Does anyone else think so? If so, do they have a chance??? Will all the others get it too??? Is there any way to cure or treat it??? These chicks were supposed to have been vaccinated, so I'm really confused. Well, any advice would be extremely helpful. Thanks in advance for the help. P.S. We have one 3 year old hen in the coop outside. If this is the disease, could she get it?