one of my 3 year old hens( a New Hampshire Red) suddenly died yesterday, found her in the coop in the afternoon. Very healthy appearing and plump the day before. Had her since 2 days old. Did have a production red that was thin, pale comb, and died a week before after I separated her from the flock of 6, but none of the others seem ill. I have not wormed them this year. I put apple cider vinegar in their drinking water several times a week, which I have read keeps parasites at bay. Any ideas. I really don't know why the first one died, I actually thought that the other hens were keeping her from eating.