I have 4 hens total. One of them, Ruby, is about 1 or 1 1/2 yrs. old. She's recently stopped laying but goes into the nesting box alot. When I let all the chickens out in the moring, she does come out, but only for a few minutes. She also has been sleeping in the box. When I reach in to pet her, she doesn't fluff up or try to peck me. She mostly acts like she's scared and trys to huddle up in the corner further. Other than that, she acts "normal". As for another hen, Oreo (about the same age) she hasn't been laying either, but doesn't visit the nesting box (as far as I can tell) but she eats and drinks very well and seems to be acting normal. The other two seem to have no problems and lay everyday. Anyone have any guesses as to what's going on?