It depends what you eat. If you eat fish sticks and frozen pizza ...then I agree, but if you are eating healthy - then your compost bin is excellent variety of vitamins and nutrients for them. Fruits, veggies, berries, cooked meat scraps, soggy cereals, milk, brown rice, ends of your celery/...
Broccoli stems, earth worms, potato peels, carrots.
LOVE lots of other things on this thread like banana and squash/pumpkin seeds...berries, grapes- devour those.