This is what we do and we aren't experts by any means but our chooks seem happy.

Our chooks get all our vegie scraps (not onion of course and they aren't fond of potatoe scaps) w also give them bread (we don't soak it in water but do break it up for them) we also get a laying pellets from the local farming supply shop.

We get the best brightest yoke eggs ever goodluck