How We Research
Every guide here starts with one question: will this door work for your pet and your home? A door that suits a 12 lb cat and a brick wall is the wrong pick for a 90 lb dog and a patio door.
Here is how we get to an answer.
1. We start with where the door goes
Sliding glass doors, wood or metal doors, storm doors and outside walls each need a different kind of pet door. So we sort doors by where they fit first.
We check the frame height for patio inserts, the door thickness for flaps and the wall depth for tunnels.
2. We match the door to your pet
The flap opening matters more than the size label. One brand's "large" can be another brand's "medium".
We compare the flap width and height, the step-over height and the weight limit the maker lists. Our measuring guide shows how to check your own pet.
3. We compare build and features
We look at the frame (plastic, aluminum or steel), the number of flaps, the magnets and seals, and the locking panel.
For automatic and microchip doors, we also check how the door knows your pet, what powers it and what it does when the battery runs low. Makers describe their doors in their own words, so we name the brand on every claim.
4. We read owner feedback
We look for patterns in what owners report, like flaps that curl, magnets that won't hold in wind, sensors that miss a collar or tunnels that don't fit.
One bad review doesn't sink a door. A pattern does.
5. We score each door
Our score weighs specs, features and owner feedback against what that guide's reader needs. The same door can score well in one guide and lower in another.
Scores spread out on purpose. A perfect 10 is rare.
6. We keep guides current
Pet doors come in many sizes under one name, so we check the exact size and model on every pick. We only link new units, never refurbished ones.
We skip doors with a known recall. When we update a guide, the "Updated on" date changes with it.
What our picks are not
Our picks come from research, not hands-on testing. We don't claim to have installed or used every door we cover.
A large pet door can let a small child or another animal through. Keep the locking panel in place when you can't watch the door, and check for wires and pipes before you cut into any wall or door.