I had about 1/3 bag of rice hulls and wanted to use the bag to clean the bunny hutch, so I dumped the hulls in half the run. You’d think it was chicken Christmas! Most of the girls wandered into the run from free range time and opted to stay INSIDE the run to dig through the hulls, even though the gate was wide open! For those of you with “bored” chickens, give this a try for entertainment!