I ordered 25 pullets. They should be here the first week of March. But I am a little worried. The last time my mother ordered chicks she lost about half of them. They would poop and it would cake up on their rear ends. She tried keeping them cleaned but couldn't always keep up and many succumbed to what must have been a toxic reaction to not being able to eliminate. Does anyone know what this is? What causes it? How to treat it? Just in case I run into it I want to be prepared...Thanks!!