Last year I had a bale of straw to put down on the muddy places in the run and yard. The chickens got ahold of it and had a blast. But I'm thinking that the straw has no nutritional value at all. I keep seeing the square straw bales for sale around here and I'm thinking of getting some to toss in the run this winter when they aren't getting to free range as often. What do we think of hay? They'd still have access to layer pellets and the occasional treat. The hay would be for entertainment mostly. Thoughts?