Quick answer: To build a scratch-and-hide combo from moving boxes for several cats, tape two sturdy boxes into an L with two exits, line the floor and one outer wall with corrugated cardboard strips for scratching, and make one combo per cat plus one extra. Place each in a different area so no cat has to pass another to use it.
Moving week leaves a stack of strong boxes and, often, a group of unsettled cats. A box that doubles as a hiding place and a scratch surface uses those boxes well, and it can be built in under an hour with tape and a craft knife. In a multi-cat home, though, one combo in the middle of the living room can cause more tension than it solves.
This guide covers the build, the two-exit rule, how many combos to make, and where to put them. For larger cardboard projects, our cardboard castle from moving boxes for multi-cat homes goes a step further.
Why Multi-Cat Homes Need More Than One Hideout
Cats that share a home do not always see themselves as a group. International Cat Care explains that when key resources such as beds and scratching posts are limited, cats will either avoid each other or suppress their natural behaviour to avoid conflict. A single hideout can become something one cat guards and the others avoid.
The answer is quantity and spacing. International Cat Care advises that resources should be available as a minimum of one per cat, plus at least one extra, spaced out around the home. For three cats, that means four scratch-and-hide combos, or at least four separate hiding and scratching options counting existing furniture.
A cardboard combo is a cheap way to reach those numbers quickly, especially in a new home where the cats have not yet settled on favourite spots.
Materials for a Scratch-and-Hide Combo From Moving Boxes
Pick double-wall boxes if you have them; they survive scratching far longer. You also need paper tape or water-activated tape, a craft knife, a metal ruler and spare flat cardboard for the scratch strips.
- Two medium double-wall moving boxes per combo
- Paper tape, not plastic packing tape, on any surface a cat can reach
- Spare flat cardboard to cut into 5 to 6 cm strips
- Non-toxic PVA glue for the scratch insert
- A craft knife and cutting mat
Remove every staple, label and plastic window before you start. Peel off old packing tape where you can, since cats chew loose tape. Our guide to the best corrugated cardboard for a homemade scratcher explains which board lasts longest.
The Under-an-Hour Build
- Stand both boxes on their sides and tape them together in an L shape, with the openings facing different directions.
- Cut an entrance about 18 cm wide in the end of each box, so the L has two exits.
- Cut a 15 cm window between the two boxes so cats can pass from one to the other.
- Glue cardboard strips on edge, tightly packed, into a shallow tray that fits the floor of one box.
- Glue a second strip panel to one outer wall for vertical scratching.
- Tape all edges with paper tape and leave the glue to dry for an hour before use.
Most of the time goes into cutting strips. Batch-cut them for several combos at once to stay inside the hour.
The Two-Exit Rule
A hideout with one entrance can feel like a trap if another cat sits outside it. Two exits, facing different directions, let a cat leave without passing the cat it is avoiding. This one design choice does more for multi-cat harmony than anything else in the build.
Keep each entrance at floor level and wide enough for the largest cat to walk through without squeezing. Avoid tunnels long enough for a cat to be cornered inside.
Watch how the cats use the combo in the first few days. If one cat sits at an entrance and another stops going in, move the combo or add another one somewhere else.
Scratch Surfaces Inside and Out
Cats scratch both to stretch and to mark. A combo with a horizontal insert on the floor and a vertical panel on the outside covers both preferences. International Cat Care suggests posts as tall as the cat at full stretch, which a box side rarely is, so treat the cardboard panels as extra scratch spots rather than the main post.
In a multi-cat household, each cat often has a favourite texture or angle. Our guide on how many scratching posts a cat needs explains how to count total stations, and our DIY scratcher hub has builds for taller posts to place alongside the boxes.
Where to Place Each Combo
Spread combos across different rooms or at least different zones. Avoid placing them next to food bowls or litter trays, and avoid narrow hallways where cats have to pass each other.
| Spot | Good for | Watch out for |
|---|---|---|
| Quiet bedroom corner | Shy cats, naps | Too far from family life for social cats |
| Living room, against a wall | Confident cats, scratching after play | Busy foot traffic |
| Near a window | Watching outside | Strong sun heating the box |
| Landing or spare room | A cat avoiding the others | Hard to monitor |
A new home is a good moment to add hiding places in every room. Our guide on how to introduce cats explains why separate zones matter in the first weeks, too.
Signs It Is Working, or Not
A working combo is used by more than one cat at different times, and nobody hisses at the entrances. Scratch strips wear evenly, and cats walk past each other without staring. If one cat hides constantly, stops eating or starts toileting outside the box, look at stress levels across the home. Our guide to signs of stress in cats lists what to watch for.
If two cats keep competing for one combo, it is usually in the best spot: warm, quiet and with a view. Build a second combo nearby with the same qualities rather than moving the first.
When to Rebuild
Cardboard is a short-life material. Replace the floor insert when it is shredded down to the base, and replace the whole combo if it gets wet, crushed or soiled. Most last four to eight weeks with regular use.
Keep a few flat boxes after the move for this purpose. Once the household has settled, you may find the cats have chosen a couple of favourite spots, and those are the places to put a permanent scratcher or bed. For more small-space ideas, browse our small apartment cat home hub.
Adapting the Build for Shy, Senior or Large Cats
Not every cat in a group uses a box the same way. A shy cat often prefers a combo with a smaller main entrance and a partly closed back, so it can see out without being seen. Leave the second exit in place, but face it toward a wall or a piece of furniture rather than the open room.
Senior cats need low thresholds. Trim the entrance so the bottom edge sits flush with the floor, and keep the floor insert shallow so there is no step up. Place their combo on the floor they spend most time on, close to their water and litter tray.
Large cats need taller and longer boxes. If a cat has to crouch to turn around inside, it will use the combo less. Size up the boxes, widen both entrances, and reinforce the roof with a second layer of cardboard so it does not sag when another cat sits on top.
Moving Box Combo Questions for Multi-Cat Owners
How many scratch-and-hide combos do I need for three cats?
Aim for four: one per cat plus one extra, as International Cat Care recommends for key resources. Existing beds, posts and cat trees count toward the total, so you may need fewer boxes if the home already has several hiding and scratching spots. Spread them across different rooms rather than grouping them.
Is packing tape safe on a cat box?
Plastic packing tape is best kept away from surfaces cats can reach, because loose ends get chewed and swallowed. Use paper tape for joins the cat can touch, and peel off old tape from the moving boxes before you build. Check the combo weekly and remove any strips that lift.
Why does one cat block the entrance?
A cat sitting at an entrance is often guarding a valued spot or watching another cat. A second exit lets the other cat leave safely. If the blocking continues, add another combo in a different area with similar warmth and views, so both cats have a good option without sharing.
Can I use printed moving boxes?
Yes, plain printed cardboard is generally fine. Avoid glossy, laminated or plastic-coated boxes, and remove labels, staples and plastic windows. Choose clean boxes that have not held chemicals, food spills or anything with a strong smell, since cats may avoid or chew contaminated cardboard.
