Buying the door is only half the battle; your cat has to actually use it. Many cats are cautious about environmental changes and may need a "soft launch". How does your cat access the outdoor enclosure?

Look for "large" or "extra-large" models that offer 8 to 10 inches of clearance.

Not all cat doors are created equal. Your choice depends on whether you're granting access to the wild outdoors or simply hiding a litter box.

If you aren't ready to commit to a permanent hole in your wall or door, custom window inserts made of PVC or glass allow for a non-destructive installation.

These are often simple, open arches or decorative frames designed for interior walls. They are perfect for giving your cat access to a "cat-only" room (like a laundry room with a litter box) without leaving the door ajar.

Typically require an opening around 5 to 7 inches.