I went to my local Tractor Supply to purchase wood pellets and they had Ozark Hardwood Products pellets. The bags had a warning on them about "not responsible for damage to humans or animals from consumption and that they were only to be used for fuel." The bag lists only 100% hardwood with no additives so it seems safe but I wanted to check with the experts on this forum. Here is the website: www.ozarkhardwoodproducts.com:?: