Two days ago I found my 7 year old son for the 1st time holding his pet hen Sophie contently on her back w/ her feet in the air. He said he had been holding her for about 3 minutes. When he went to hold our other hen Eva (in the normal position) Sophie ran up and pecked her in the face. This happened each time he held Eva over the next 45 minutes. Sophie is the sweetest girl and the only time I have ever seen her peck her sister is when Eva steals her sleeping spot. The next day their was a puddle of clear liquid w/ an egg in the nesting box. Also Sophie pecked Eva in the face 2x's for no apparent reason this time (Eva had blood running down her beak). Today my son found Sophie laying on top of the concrete block (in the spot where the feeder sets, it was knocked off). She was on her back w/ her feet in the air. My son was out there for over an hour so I went to check on him and she was still laying there in that same position (so for a minimum of over an hour). She rolled off when she saw me, probably because I'm the food lady and then she was acting normal. When we went to put them to bed she still hadn't laid an egg for the day and there was another puddle of clear liquid in the nesting box. Any thoughts?