I am new to backyard chickens. I purchased 5 started pullets from Murray McMurray this past summer. All five arrived in good shape on July 10th. I have 1 of each, Black Australorp,Buff Orpington, Rhode Island Red, Silver laced Wyandotte, and A Light Brahma. All five started laying eggs by the middle of September. They are all healthy and a joy to have around. The problem I am having with the girls is that they pack their water with straw. I put the straw down in the run under the coop to keep them off of the cold ground. I Is this normal behavior? I have tried raising the water off of the ground, even bought a heated waterer for the really cold weather. They seem to love packing the straw in the bottom of the tray. I clean it out and a day later it is full again. Any suggestions?