I used to leave a corrugated sink sheet lying flat on the ground just for the chickens. After about 2 or 3 summer weeks, there would be so many crickets under that sheet. I'd stand by the sheet, call the chickens and flip the sheet over, releasing the treats. They soon learned.
Chickens are omnivorous and when given the chance, will happily devour a surprising assortment of bugs and small animals. I've seen mine eat frogs, small snakes, mice… Most of us prefer to be a bit less adventurous when meeting our flocks' craving for meat and stick to providing things like...