Litter Box Setup for a New Rescue Cat

Most cats already know what a litter box is for. What you control is the setup: how many boxes, where they go, what kind of box and litter, and how clean they are. Get these right from the start and you prevent most problems before they begin.

This article matches pages 18 and 19 of the free First Night Home 14-Day Planner (Litter box setup, and the Litter box plan and log) and Video Guide 11.

How many boxes?

A common guideline, mentioned by sources including the ASPCA and Cornell Feline Health Center, is one litter box per cat plus one extra. Spread them across different spots, with at least one box on each floor of the home your cat uses.

In the safe room during the first days (Guide 7), one box is enough to start. Add more as your cat's territory expands.

Where to put them

• A quiet, low-traffic spot that's easy to reach
• Away from food and water bowls
• Not next to loud appliances like washing machines or furnaces that can startle a cat mid-use
• With open space around it, so your cat can see and leave easily
• In different places, not side by side. Two boxes next to each other often act like one big box

Avoid moving boxes around once your cat is using them. If you need to move one, do it gradually.

Choosing the box

• Size. Big enough for your cat to turn around and dig comfortably. Many commercial boxes are on the small side for adult cats; large storage bins with a cut-down entry can work.
• Entry height. A low entry for kittens, seniors or cats with stiff joints.
• Covered or uncovered? Start uncovered. Many cats prefer open boxes. If you want to try a covered box, keep an uncovered option available too.

Choosing the litter

• Start with what the shelter or foster used. Familiarity helps.
• Unscented. Skip scented litters, sprays and deodorizers near the box. Cats have sensitive noses.
• Enough depth to dig and cover.
• Changing types? Do it gradually: offer the new litter in a second box rather than swapping everything at once.

Best Friends Animal Society's guidance on getting cats to use the litter box covers many of these same setup basics.

Keeping it clean

• Scoop at least once a day
• Do a full litter change and wash the box on a regular schedule
• Wash with mild, unscented soap and water; avoid harsh-smelling cleaners
• Clean any accidents outside the box with a pet-safe enzyme cleaner so the smell doesn't draw your cat back

The first day

When your cat arrives in the safe room, show them where the box is by letting them explore the room. You don't need to place them in it. Note in the tracker when they first use it. Many cats use the box within the first day, but some stressed cats take a bit longer.

If your cat hasn't used the litter box within a day or so, or seems to strain, call your vet.

When a cat goes outside the box

The ASPCA and Cornell Feline Health Center both point out that litter box problems can have medical causes as well as behavioral ones. That's why the first step is always the vet.

See your vet first if your cat:

• Goes outside the box
• Strains, makes many trips, or produces little or no urine
• Cries in the box
• Has blood in urine or stool
• Shows any change in litter habits

If your cat is straining and producing little or no urine, don't wait: call your vet or an emergency clinic right away.

Once medical issues are ruled out, look at the setup: number of boxes, location, cleanliness, litter type, and stress from other pets or changes. Cornell's guidance on house soiling walks through many of these factors.

Never punish accidents. It increases stress and fear and can make the problem worse.

Multi-cat homes

In homes with more than one cat, place boxes in different areas so one cat can't block another's access. Follow the one-per-cat-plus-one guideline, and make sure boxes aren't all in one room. During introductions (Guide 8), each cat should have their own boxes.

Use the plan and log

Page 19 of the planner has a litter box plan (number of cats, number of boxes, litter type, who scoops and when, full clean day, and the shelter's litter) and space to sketch your home with boxes, food, water and the safe room marked. It's a quick check that your setup follows the basics.

A quick litter box checklist

• Number of boxes: one per cat, plus one
• One box on each floor your cat uses
• Boxes in quiet, separate spots, away from food and water
• Big, uncovered boxes with a low entry
• Unscented litter, ideally the type the shelter used
• Scoop daily; full clean and wash on a regular schedule
• Enzyme cleaner on hand for accidents
• Any change in litter habits: call your vet first

The short version

One box per cat plus one, in quiet separate places, uncovered and unscented to start, scooped daily. Any change in litter habits means a call to your vet first. This guide is general education only.

Common questions

Sources

Checked October 24, 2026. This guide summarizes public guidance from these organizations; it is not veterinary advice.

1. ASPCA, Litter Box Problems
2. Cornell Feline Health Center, Feline Behavior Problems: House Soiling
3. Best Friends Animal Society, How to Get Your Cat to Use the Litter Box
4. San Diego Humane Society, Cat Confinement in a New Home