Scraps and foraging are a great addition to their diet! But to keep them laying for many years they need a feed that supplements calcium. Making egg shells will leech calcium from their bones and they’ll live short lives if they don’t have enough in their feed. I like feeding a mash of soy, corn and other vitamins.

Unfortunately good feed is more expensive than the chicken.

Try out the Divinity Original Sin series, also produced by Larian. Different system and setting but it’s wonderful.