We have chicks together of multiple ages - 2, 3 and 4 weeks old. They get along fine. 2 days ago one found a feather and and was eating it. My husband grabbed it out of it's mouth, only the quill remaining. Do we need to worry? They have alot of space, temperature is good. It was one random feather, but the concern is if the feather is harmful and/or if we need to monitor to make sure no one is picking on anyone (we haven't seen that)