If your chickens are lucky (like mine) and get to roam the garden, why not plant some of their favourite snack foods around the place?  Pigeon pea, chicory, kale asian greens and lettuce are easy to grow so put extra seeds in so you can share with your chickens.
Also, don’t forget to give them the vege scraps from the kitchen i.e. cabbage, broccoli and cauliflower etc.

They will love you.