Basic dog doors generally have a single flap, and there are energy-efficient ... from an under-$45 model from well-known brand PetSafe to an automatic door that's upwards of $200.

Cons: The flap is pretty noisy when opening and closing, which may scare anxious pets. Check Price: PetSafe 1-Piece Sliding Glass Pet Door Ownpets Dog Screen Door Dog Screen Door Bottom Line ...

Looking for the best Petsafe Dog Door Installations? ... PetSafe Plastic Pet Door; DESIGNED FOR LARGE PETS: Flap opening is 10 1/8" x 16 7/8" with 5 holes at the top of the flap for adjustment ...

I rounded up the best wireless dog fences to help keep curious pups safe outdoors. See expert-recommended picks, plus the crucial things to know before buying one.