I don't give my chickens treats really. Some scratch feed maybe twice a week and some alfalfa pellets in between that. With a 100 chickens, there lucky to get feed.
Actually, they pay for there own feed. But still. When I first started and only had 3-4 chickens they got a lot. Probably too much. But now, too many. In the summer they get fresh cherry tomato's, green beans, cucumbers, strawberries etc out of the garden. Plus in the summer months there chasing bugs and everything else. There outside all year. My run for the production reds is like a 1/4 acre. The new place I'm fencing in is probably over a 1/2 acre. Trust me, there not starving!!