Wait, of course, chickens get fat too. I just got two Isa Browns today, beautiful things. We put the startled pullers into their coop and went to go get their food. We were stopped soon after when my grandfather insited that the scratch mix we were going to feed them, although full of nutrients, was far too fatty. It was 19% fat instead of 16% percent fat. I'm not keen on our 20 week ur old chickens getting overweight, especially in the blazing Australian summers they'll have to ordeal. Apparently this is how it goes: +20% fat, chickens get overweight. -16% fat, they become under nourished. We plan to supplement their scratch with plenty of chicken safe scraps. Please jive me some advice, Thx BYC!!!