I serve game bird feed to the entire flock; it is higher in protein than the best chicken feed that they have on offer here; some months the grind equates to only 15% protein, and other months the same feed bag tag will indicate that it has well over 24%. That's Panama for you. We buy what they have or we don't buy; that is our only choice. Anyway... It is far easier to reduce the protein intake of my chickens with treats than to boost it with meat products. All fruit and veggie treats, oatmeal, pasta, etc., will pull down their overall intake of protein. (A handy trick for those few months when the game bird feed is too high in protein for chickens) For the months where the available feed is coming in to the store with sub-par protein content, I fortify their water with a product called Chick Booster. It's a liquid multivitamin, mineral and amino acid supplement. It sounds like more work than it is. I merely check the tags for nutritional analysis and adjust how much chick booster I add to the water to balance it to my liking. Apparently the chick booster tastes good too, as my flock prefers to drink the fortified water over plain.