Litter, boxes and automatic units, judged on odour control, tracking and whether cats accept them.
Five self-cleaning boxes judged on what decides the purchase: whether cats accept them, what the consumables cost, and what happens when the motor stops.
Five litters judged on clumping strength, dust, tracking and the thing that decides everything: whether cats will actually use them.
The preference studies are less one-sided than either camp claims. What they found, what they could not measure, and how to test it on your own cat in a week.
Six variables, in the order they should be checked. Doing this out of sequence is why households spend six months on the wrong one.
The n plus one rule, why lining boxes up in one room defeats it, and the placement mistakes behind most household soiling problems.
