I lost a 2.5 year old leghorn a couple of weeks ago to an unknown cause. She just started getting weaker and weaker. She wasn't laying and didn't seem to be eggbound. (There was no "pulsing" of the vent area). She slept in a nesting box for a few days. Grasping at straws, I thought maybe there was a vent problem because she looked so messy, so I gave her a warm bath and a blow dry. She did seem relaxed during this, but afterward she tried to flap her wings once while she was still in the towel, and then she was gone. Did I do something wrong? Now I have a big fat brown hen who is standing on the floor and not roosting or laying down. She is walking slowly but did come to get a treat of a piece of bread I threw in the coop this am. I have 6 other girls and 1 rooster who seem to be ok, although everybody looks a little scruffy from molting. I feed them layer feed that I buy at the feed store, but I'm wondering if maybe there is a dietary problem and don't want to lose any of the others. Some are 1 year old, some are 2 1/2. I am only getting 1 egg maybe every other day from a leghorn that is 2. Any ideas or suggestions? Thank you.