Hello all. We're running two chicken tractors and one standard (8x8 house). We moved five RIR's into one tractor June-1 and two RIR's into another tractor the same day. The other 15 RIR's are in the house & yard. All of the chickens are two years old and they all get the same food. The tractor chickens get a little less of the feed because they're mobile. The chickens in the house have continued to lay eggs daily. The birds in the tractors have stopped laying. The first day they were in we got eggs...both were broken (due to not putting enough pine bark & hay in the nesting boxes...but this has been remedied (i think). Could the material that is in their nesting boxes be the reason they've quit laying eggs, or is it something else? Thanks!