Our real-life tester for clay litter, testing writer Michelle Rae Uy, has three cats and describes one’s poops as “atomic,” resulting in a smell that permeates and lingers in her apartment.

To learn more about the litter preferences of cats, we consulted five veterinarians. Guided by their advice, we tested 30 different litters, including clay, paper, silica gel, wood, grass ...

We’ve got the scoop on traditional clay box fillers and the alternatives. Credit...Naomi Anderson-Subryan Supported by By Elizabeth Anne Brown House training cats is easy. Most will use a litter ...