iv lost 3 chickens already, They show no signs of sickness fine one day dead the next. I have lost 2 hens and a roo. No signs of anything. Today I noticed one of my hens just sitting in her run I went in and picked her up and put her on her feet and she fell back down. Its like she has no controll of her legs. I gave her some water with some sulmet and she drank well and even ate. Has a nice full crop. Clear alert eyes she just cannot stand up. I just lost one of my roosters yesterday and I dont know what to do all my chickens have been wormed. They did however while free ranging drink some rain water in a bucket that had been there for weeks.? idk what to do im losing my chickens and have no way to know whats going on. not even weird poo's can somone help me?