I thought you guys meant rice alone.
Mine aren't at laying age yet, so I also mix in their starter feed to create a mash so that they're still getting what they need. They also think that feed alone soaked in warm water is a treat.
They're not fond of cooked Lima beans or carrots, and they half-heartedly eat the kale my neighbor brings over from his garden, the same applies for scratch. They will eat collard greens and they absolutely go bonkers over spaghetti with some peas and string beans mixed in. I haven't tried any broccoli or cauliflower yet, but still testing their taste buds to see what they will eat. They're greedy to begin with LOL, and the stuff does get eaten.
I make sure they empty their two-day supply of feed first, then refill it, keeping that a priority, then if they put a good dent in that refill, I'll decide whether or not to reward them with a treat later on in the evening... it's not a guaranteed thing.
Maybe give them some cooked rice with some dried meal worms and feed mixed in, or make a wet mash out of their feed and mix some goodies in there. Something to break the monotony of pecking at dry crumbles and pellets but still getting their feed in one way or another.
Sorry for the essay. --BB