I rescued four neglected chickens on Xmas eve. They had spent three weeks scratching in the corpse of one of their flock mates. Since I’ve gotten them one has had constant diarrhea. Now it’s two. I treated with Corid and no improvement. They are acting absolutely fine except for the diarrhea. Any other ideas on how to attempt to treat? Or what might cause it? I keep hearing worms don’t really cause diarrhea. I’m worried they caught something from picking in the decaying corpse for three weeks.