I bought my chicks 3 weeks ago from Tractor Supply and was told they were a week old. So, I’ve assumed them to be about 4 weeks old. But I read an article on this website that talked about chicks getting feathers at 5-7 weeks old. Mine still have fuzzy heads, but otherwise seem pretty much all feathered. How old do you think they are? They are Rhode Island Reds and Golden Sex Links.