We have 3 who are about 7-8 weeks, and 2 who are now 4 weeks. It blows my mind how different they are in size! It's like the older ones swallowed themselves in the past 2 weeks, I just can't believe how fast they grow. Our little ones should be fully feathered in a week or two, but I'm scared to put them with the bigger chicks! They are monsters in comparison! Is it really going to be ok?