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Equipment

Choosing a Litter Box Setup Cats Will Actually Use

Size, number, location and litter type solve more litter box problems than any special box design.

By Marcus ColeVeterinary review: Priya Raman7 min readPublished 2026-04-25Updated 2026-08-18

Size before style

A litter box should be at least one and a half times the cat's body length from nose to base of tail, and most commercially sold boxes are too small for an adult cat by this standard. A large, low-cost storage container with an entry cut into one side is often a better fit than a purpose-made box marketed as stylish.

The one-per-cat-plus-one rule

Provide one litter box per cat in the household plus one extra, placed in different locations rather than lined up together — to a cat, boxes side by side function as one resource, not several. Multi-cat households with too few boxes see far more toileting outside the box than households that follow this guideline.

Covered, uncovered and self-cleaning

Covered boxes trap odour inside rather than in the room, which many cats dislike, and can also make it harder for a cat to spot an approaching housemate — a factor in multi-cat conflict. Self-cleaning boxes suit some cats well but their motor noise and movement frighten others; introduce any new box type gradually alongside a familiar one rather than as a sudden full replacement.

  • Place boxes in quiet, accessible locations away from food and water
  • Avoid siting a box next to a noisy appliance that could startle a cat mid-use
  • Scoop at least once daily — litter box avoidance is one of the most common preventable behaviour complaints

Litter type

Most cats show a preference for a soft, sand-like, unscented clumping litter over scented, coarse or crystal alternatives, though individual preference varies. Change litter type gradually by mixing old and new, and treat a sudden refusal to use a familiar box as a possible sign of pain or illness worth a veterinary check before assuming it is purely behavioural.

Frequently asked questions

Is a covered box ever the better choice?
For a cat that already uses one happily and shows no signs of avoidance, a covered box is fine — the ideal setup is whatever the individual cat reliably uses without hesitation, tested by watching behaviour rather than assuming a design is universally right or wrong.