I have two Ayam Cemani chicks, one boy one girl. The girl became ill at 3 weeks of age (treated for cocci) and made a full recovery. Well, she has not grown since or has any new feathers. She eats, drinks, sleeps and is active like the other chicks. Her brother is 4 times her size. I have read this happens to others but they tend to be weak where she is not. Or that some chicks take longer to grow than others, but not to grow for over a month? Has this happened to any one else? What is going on?