When I butcher I sometimes have to fight off the chickens cause they will take the cracass from me, when processing a deer in the yard I step on the hens trying to catch bits of fat, meat and blood........ chickens are omnivorous and we should not forget it and feed accordingly, it makes for much healthier birds then on purely vegetarian fed birds(I tested it for 2 yrs, 1 pen all vegan and 1 pen that gets everything! The Vegan hens were never as shiny and nicely feathered and the eggs were less flavourful according to the costumers).
Now when people ask me if the hens are purely grain fed when they buy eggs I tell them no, my chickens are not malnutritioned they have a balanced diet. Answer from them is; arent grains a balanced diet?.......