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Arm & Hammer Ultra Last is a clumping clay cat litter sold in an 18-lb bag. It is unscented and relies on baking soda plus a long-lasting odor-control claim rather than added perfume. It suits owners who want a plain clay clumper without fragrance and who scoop daily. Against scented litters it avoids perfume smell, but it is a heavy bag and clumps are less rock-hard than premium clays.
In stock
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Lowest price we've seen: $15.99 on Nov 9 at Chewy. Tracked across 1 store since Nov 9.
Owners like that it is unscented and still controls odor reasonably well for the price. Many say clumping is decent but not the hardest, and some mention dust and tracking.
