Our chicks are 3 1/2 weeks old. We have 6 ISA Browns from TSC. This is our 1st time raising chicks. My wife found a hard shell bug and gave it to one of the chicks. All I can say is that was one of the funniest things I have witnessed in some time. The bug was too large to just swallow so all the others gave chase. The chick with the bug would get a lead on the others and would stop make a few pecks on the bug. The others would catch up and it would start again.