No not realy, you found a good one here.:thumbsup:
I have used straw, chips, saw shavings. The chips well I had too many dogs chew on em and have the I can't go thing offten. pups choke on them some. Saw shavings there is allot of dust so they can sneeze allot. Straw is better in my own opinion if kept dry and fresh, not old dusty stuff. But any moisture and your dog is stained orange yellow, if they have white on them they don't look the best, they seem to like fresh straw better then wood products. Never tried the hay or wild grass thing, some of the guys speak pretty highly of it on here. I think Jmc uses some prairie grass type stuff that sounds good, get him to chime in. Could be a better option if you can get it.