Hi!
I was looking at TSC for potential litters and I found three that seem suitable.

This one is $9.69 for 35 pounds.
Description:
35LB CONDENSED SOFTWOOD PELLETS
– High performance, premium Horse and Stable bedding
– 100% Natural (Biodegradable) Softwood Pellets
-The fiber used to make our pellet is kiln dried. We use a mix of pure black spruce and pure jackpine.
– The most absorbent product on the market
– Virtually dust free
-pellets ARE FREE OF bark, leaves or other additives or contaminants

This one is $7.99 for 40 pounds.
Description:
40LB WOOD PELLETS
100% Natural North American Soft Red Pine Wood Fuel Pellets
Burns hotter, cleaner and with less clinkers than most competitive brands
8802 BTU +/-
Less than 0.5% Ash
Low moisture 5.15%
This one is also $7.99 for 40 pounds.
Description:
40LB PREMIUM WOOD PELLETS
NOTE: Limited supply available. Not available in all TSC Stores. Please contact your local TSC Stores for product availability.
Weight 40 lb/bag
Composition Hardwood and softwood (no additives)
Calorific value 8000 btu/lb (17.8 MJ/kg)
Moisture content 5.22%
Ash content 0.61%
Fines < 0.1%
Bulk density 43 lb/pi³
Diameter 6.3 mm
Are all of these safe? Which one would be best? Has anyone had any experience with any of these three particular brands?
Thanks!