I've always had chickens free ranging where I kept horses and cattle. They spent a lot of time in the hay barn. Never had crop impactions but they had plenty of gravel for grit.
I now keep my chickens in a large pen and I use a mix of alfalfa and pine straw (pine needles) as the coop bedding. They eat the alfalfa leaves and the stems become bedding. I offer grit free choice.
Not saying hay doesn't cause crop impactions. Grass can, too. I guess, if you worry about crop impactions the chickens can live in wire cages and eat only crumbles or mash.
But, not my chickens. I'd rather take the possible chance of losing one every 25-30 years to an impaction than to raising them like battery hens.
I now keep my chickens in a large pen and I use a mix of alfalfa and pine straw (pine needles) as the coop bedding. They eat the alfalfa leaves and the stems become bedding. I offer grit free choice.
Not saying hay doesn't cause crop impactions. Grass can, too. I guess, if you worry about crop impactions the chickens can live in wire cages and eat only crumbles or mash.
But, not my chickens. I'd rather take the possible chance of losing one every 25-30 years to an impaction than to raising them like battery hens.