Google the name of your city and "fuel pellets" (leave the quotes around fuel pellets. That'll find you the stove stuff. You'll have to check to make sure there are no accelerants added, and as with all pellets, that they don't smell strongly of pine.
Google the name of your city and "animal bedding pellets" or "horse stall pellets" for the animal bedding. That's more likely to smell of pine but won't have accelerants added.
Places like home improvement stores and some hardware stores carry the stove pellets, as do places that sell pellet fuel stoves. Feed stores carry the bedding pellets.
If you find the fuel store pellets and like them, then get enough to last you through the summer and fall, because they'll disappear from the store as soon as warm weather comes.