I'm really sorry... maybe you could play a really mean joke on your sister like putting stuff in her shampoo or just hold it against her for the rest of her life and milk it forever. Whenever you want her to do something you could bring it up and make her feel bad about it. She's a bad sister. I...
Don't worry about the chicks they will be fine, I have one black shamo that I got from ideal poultry last year and she is the sweetest of all of the hens, which I was shocked by considering they are a fighting breed and I had read tons of online articles about how they fight with other chickens...