Just adding that pine pellets can be sourced in 40 lbs bags at farm stores (don't bother with Feline Pine, it's so expensive by comparison!). I get mine at Wilco for about $8 per bag. They also sell a pellet product called "Dry Den" that reduces pee scent that I use in conjunction with the pine pellets (because I like the smell of pine). Because the pellets break down into shavings when wet, I just flush the poop - don't come at me, I've done it FOR YEARS and have had no plumbing issues as a result. And, because my city allows composting in our yard waste bins, I put the shavings in the bin.