One ear up hay

My chin doesn't seem to be liking the Oxbow hay I've been buying, so I am thinking of switching it up and trying some other brands. Back when I had rabbits, I used to give the hay from One ear up. I want to buy the four-pound mix and match box so I can try some different kinds. Are all of these safe, and if so, do you guys have any recommendations?

http://www.oneearuphay.com/hay-menu