* Not clean enough (scoop daily; change completely and thoroughly wash and rinse the box every few weeks, depending on usage) * Not big enough *
Sides too high (especially for kittens and arthritic older cats) *
Sides too low (cat's rear ends up
hanging over the edge) * Doesn't like the lid * Prefers a lid * Doesn't like the
liner * All boxes lined up in one location * Box in wrong location (too noisy, too much traffic, poor access, insufficient visibility) * Inadequate access to boxes (doors or stairs in the way; e.g., multi-level homes need a box on each floor) * Aversive cleanser used (Pine - Sol, Lysol) * Mechanical box too scary * Access problems (door accidentally closed, access blocked by another cat)