Now that I'm feeding free choice hay, my boys are leaving the very hard stem behind in the feeder and they look like they are starving. They are even browsing. That's all good but they are young right now and they need their nutrition. They were calling for me most of the day, which is unusual. Do they not eat the hard stem? Is it bad hay? How do you know what is good hay? It's a orchard grass mix with alfalfa. When I went to their feeder it looked clogged with hard stems blocking anything good. Any ideas, thoughts? Should I get new hay, or pick through it. I do have straight alfalfa bales that don't look that stemmy.