You know, a lot of people use barn hay (grassbarn hay) and others buy the stuff from WalMart or Petsmart,etc. I think they are all fine if you read the labels and theinformation is what it should be.
With that, I will add that I have tried all of the above and due to myrabbit having allergies to dust, I had to change to Oxbow.There are larger, cleaner stems and way less dust and little piecesthan most "store" brands. Barn hay is fine if you know whatyou are getting. It's also going to have dust and otherirritants (like horse hair or cat dander) from things in the barn itcomes from. It was worse on Bo than the bagged hay.
Oxbow's hays are grown just for small animals and they seem to have a more controlled area for storage, etc.
It costs a little more, but in the long run I feel there is less waste and it's better for Bo.