At PetSafe, the door is $29.99 plus shipping. The front of the PetSafe Cat Corridor Interior Cat Door is shaped like a cat's head and the other side is a cat's tail.

When Lisa Harrington listed her chic cat doors on Amazon, "people just lost their minds," she said. "It catapulted to the top ...

Depets Large Cat Door for Interior and Exterior Doors: available at Amazon Our take: Weather-resistant and versatile, this cat door is an affordable and durable option for owners of average-size ...

The Kitty Pass Interior Cat Door: available at Amazon Our take: A purrfect addition to your home, this cute interior cat door is easy for you to install and even easier for your cat to use.

If you have a Maine coon or other large cat up to 30 pounds, the interior Meow Manor Extra Large Pet Door from Amazon can accommodate them. Although it's designed for cats, many dog breeds can fit ...

"Coaches are hard to find. But when you do find it, it levels your business up," says top Amazon seller Lisa Harrington.

There are a lot of options on Amazon, but I love this door's cat-shaped cutout. Ellen Hoffman/Insider Nearly 90% of the 2,800 Amazon customers who've left a review of the Purrfect Portal gave it a ...

Interior vs. exterior Some cat doors are ideal for both interior and exterior use, while others are designed specifically for one or the other, so it’s important to pick one that meets your needs.

Interior vs. exterior Some cat doors are ideal for both interior and exterior use, while others are designed specifically for one or the other, so it’s important to pick one that meets your needs.

Interior vs. exterior Some cat doors are ideal for both interior and exterior use, while others are designed specifically for one or the other, so it’s important to pick one that meets your needs.

Interior vs. exterior Some cat doors are ideal for both interior and exterior use, while others are designed specifically for one or the other, so it’s important to pick one that meets your needs.

Interior vs. exterior Some cat doors are ideal for both interior and exterior use, while others are designed specifically for one or the other, so it’s important to pick one that meets your needs.