The 8 Best Sliding Glass Pet Doors
Special Honors
Pet Door Guys In The Glass Although it requires installation by a professional glazier, if you need a permanent, custom option, the Pet Door Guys In The Glass might be just the ticket. You'll have options when it comes to the flap size, step-over height, glass type, and more, with no weather stripping required. petdoors.com
Editor's Notes
October 08, 2020:
We've considered durability, ease of use, and affordability when making our selections, but not worried too much about "inaccurate" pet sizing. Most companies that make pet doors encourage you to measure your animal, anyway, and not just rely on weight ranges or size designations like "small" or "large." As with, for instance, clothing sizes, these can vary quite a bit, but a measuring tape, wielded properly, won't lie.
As for top choices, the PetSafe Freedom is still a reliable option, as is the PetSafe 2-Piece. The Freedom model is a single-piece unit, whereas the 2-Piece, as you can guess from the name, breaks down into two parts. This makes it easier to store than the former, but it doesn't come in as many size options as the Freedom. Options from Ideal remain popular, as well, including the Ideal Pet Products VIP and the Ideal Pet Products Fast Fit.
If you're in the market for something a bit fancier, take a look at the Thermo Panel 2e SureFlap, which gives you the well-liked SureFlap pet door in a frame that's designed for sliding glass doors. You can set it to recognize up to 32 pets, but they must be on the small side, as this model doesn't come in a large version.
October 23, 2018:
Weighed energy efficiency against ease-of-use when ranking the PetSafe Freedom over the Ideal Pet Products Fast Fit, ultimately deciding that a brief period of extra training would be more than offset by savings on utility bill. Investigated user reports to determine safety of the High Tech Pet Shorty and found no safety issues to note.