Well cooked beans should be fed as a treat, and I'd couple that with rice as the combination provides a 'complete' protein (contains all the amino-acids). Eggs scrambled, hard boiled. My girls would give their wisdom teeth (if they had teeth) for a bit of raw hamburger, I give them the cheap stuff (which is lean) (the butcher charges more for anything that has fat, and that includes hamburger), I make it palatable for human consumption by adding bacon drippings. You can sprinkle dry milk on/in their regular grain to put weight onto your girls (if they're on the skinny side), don't give them this if they're already plump as a fat hen has more difficulty laying eggs. Chickens are omnivorous, they'll eat just about anything. I taught my girls to catch mice, which they did until the mice became extinct (in my yard). They also hunt, kill and eat scorpions. I feed steamed quail eggs to my chickens, I don't bother to remove the shell, I simply cut it in half and let them enjoy whatever parts they want. If they need extra calcium, they'll eat the shell... if not, they won't. I prefer to feed them the quail eggs because they do not resemble chicken eggs, so I don't have to 'disguise' it.