Mine loved cooked rice, sometimes mixed with a few treats like sultanas or something. There is always a lowest hen in the pecking order and one of my ex "commercial free range" is always that whether there are 8 hens or 28. I started letting her out of the run to free range for a few hours and fed her raisins by hand, took her gardening etc - eventually the rest became free range aswell and tho she still gets pecked at in the run overnight or if she crosses someone's path, they all have enough space that mostly she does her own thing. Still follows me from the let out feed to the doorstep for her raisins tho she doesn't always get any, wee thing came oven ready, deformed neck, permanently damaged wing and tiny, caught a chill within the first week after trying to stay out of the coop and huddling behind instead, so she was indoors in a cat box for a few days at the start anyway and I think that didn't help in terms of the others picking on her since.