I am wondering if anyone has tried any of these options, or what everyone’s opinion is on them. I have some concerns, but I don't know if any of them are valid. My boys are on grass hay in the winter, with all of their supplements, feed, etc., and pasture and everything else as needed during the summer. I like the idea of fresh grass year round, and I like the price, but I don't know how healthy it is. The link below is just one of many companies out there, I included it for reference. Thank you!