I'm not sure there is a number. I consider that if they were with a momma hen she would be hunting bugs and other stuff for them all day and they would be eating as many as she/they could find. I have 15-2 month old chicks. I turn my porch light on at night so I can harvest 20-30 bugs to feed to my chicks. I also give them a handful of mealworms each day. They love them. I also give my chicks grass clippings, grains, and plenty of chicken feed. I get teased a lot for it but, I make mine warm oatmeal on cold mornings. That is a great treat. I would just caution that you don't want them to have a diet of just bugs. They still need a balanced diet. The commercial feed supplies all the nutritional needs. But you're right it is very entertaining watching them scramble to get the bugs, worms, and whatever else I bring them. They run to meet me at the gate when they see me head to the chicken house. It is so cute.Can anyone tell me how many and how often i can feed chicks crickets? just throw a bunch in the brooder box? we already get crickets for my sons gecko and now i might have to concider buying in bulk. Sounds like a lot of fun watching the chicks scramble after them.