They just have one type of chicken feed where I live. I’m not sure of the brand, because they divide it into plastic bags. I’ve tried scattering the food, and cutting it down. Maybe a cup and a half a day? They also get any veggie scraps we have. I can barley feel my last “official” girls keel bone. But the chicken that adopted our coop and her babies are healthy and slim. I think my girls just ruled the yard, as they’re much larger than the feral chickens. So I’m not sure how to remedy the overweight problem. I can feed them less of course, but I worry about the chicks getting enough feed.