Wow, this is the first time I've heard of using any kind of hay as a feed for chickens. I've read lots of debate on here about hay vs. straw in the nesting boxes. One of the debates is which one they are more likely to eat. People express this concern because of the occurrence of impacted crops from eating hey or straw (hay seems to be more likely to cause this.) I can see their eating the dust from it, the little pieces, but.... But then I have no idea what orchard hay is. I just go to the feed store, buy a bale of hay, and use it in the nest boxes. I hae no idea what kind it is.