Ah, I see.
Well of course I do - ad lib - only the best grain (organic, GM free etc.) They also have scraps from our table (if it's good enough for us ... ) and worms, woodlice, insects, spiders and the rest which they find themselves and, if they get in the greenhouse, strawberries and, if they get in the veg plots, whatever they like. Grrrrrrrrrrrrrrr. Also the small chalky chippings from flints (makes super shells) and all sorts of things my poor old eyes can't see.
I leave that to be fed to the poor things in cages which produce the crippled chickens and pale eggs sold as the finest by the supermarkets.
Not that there's anything wrong with sheeps heads, we eat them from time to time. It's illegal to feed meat to chickens which give meat or eggs for human food. I wouldn't feed ours meat ...
Mary