Laying Hens and Nutrition

Could you tell me what the best herbs would be to feed laying hens? I've heard alfalfa, comfrey, purslane and flax. Any others?

A variety of the following may be useful: Chickweed (Stellaria media), Alfalfa (Medicago sativa), Red Clover (Trifolium praetense), Dandelion (Taraxacum officinale), Nettle (Urtica dioica), Yellow Dock (Rumex crispus), Apple pulp, Broccoli pieces, Crepis (Crepis capillaris), Cucumber, Lettuce, Mustard Greens, Papaya, Red and Green Peppers, Pumpkin pieces, Seaweeds (Fucus spp.) as well as fruit and vegetable peelings