I have 4 chicks that are about 3 months old and one of them got sick and stopped moving and just stood and slept but then I realized she was getting outgrown by a lot and so I seperated her because she was getting trampled but it only got worse she can't stand now and she's lost a lot of weight I can see her bone. She does eat and drink though so I don't know why she is so small and skinny I often see her drink so I don't think she's dehydrated and every time I give her food she eats so it's very confusing. Does she have mereks,can a chick even get mereks. Does she have a disease?