Things You'll Need:
- Plastic tub
- Tape measure
- Magic marker
- Knife
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Step 1
Purchase a large plastic tub with a removable lid that fits securely. The tub needs to be large enough for the litter box to fit in the bottom. 30 to 50 gallon is usually a good size.
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Step 2
Place the litter box inside the tub and fill the litter box as you normally would.
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Step 3
Measure the width of your cat at his belly. This is usually the widest part.
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Step 4
Take the lid of the tub and use a magic marker to draw a square where you want to put your door. Measure to make sure the door is wide enough before you cut.
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Step 5
Use a sharp knife to cut the door out of the top of the box. Put the lid securely on top of the tub.










