We've got half a dozen chickens (1 RRR, 3 Barred Rocks, 2 Australorps) and a couple of them have fallen ill. The little Australorp has always been a bit ratty looking, but healthy. Recently she and her Australorp friend have been staying in the coop all day. Her friend appears to be just fine, so her staying in the coop with the little ill one feels like she's just being nice. The little one had a really hot comb and wattle and her eyes were droopy like she was very sleepy and she was fatigued-looking. Her poop seemed fine, though. We've pilled her with metronidazole for a few days and she seems to be perking up, and her temperature's come down to just regular bird hotness. She's eating, and her eyes are better, but they're still not 100%. Any idea what might be wrong here? One of the Barred Rocks is having difficulty walking. She stumbled into the coop a couple days ago and we thought maybe she'd been eating fermenting apples. Today she stumbled out of the coop in the morning, so she couldn't have been still drunk from eating things yesterday. Maybe she's eating apple seeds? Would that cause stumbling? She's otherwise perky and has plenty of appetite. None of the other chickens show any problems. They all stopped laying over two weeks ago, just dwindled down to a halt. We thought they were maybe getting old or going broody. A couple have them have pin feathers forming. Any ideas? Thanks.