When I got my first bun, I used Feline Pine. But that began to become way too expensive because a 7 lb. bag was costing me almost $4! Plus, I was giong through it like no other, so I had to find an alternative. That’s when I turned to wood stove pellets…I live in a farming community so I can find them in tons of places. I bought a 40 lb. bag for $4.75 (you can’t beat that). Now, mine says that it’s not for human or animal consumption, but that it is environmentally safe. Therefore, I concluded that it pretty much just meant that you shouldn’t give it to your animal as food pellets. I also asked the clerk and read the package to see if there were additives, and there were none. So, Beka27, I think that you’d be just fine as long as there are no additives, but you can always ask the clerk (explain what you are using it for). If it’s a farming/tractor supply store, they should be knowledgable about that sort of stuff.
EDIT: I just realized that I didn’t note how long it lasted me. I’m still on my first bag that I bought a few weeks ago, and I change my litter every-other day. So, it is lasting me about a month or more I’d say.