Manual pet doors are the most common type of dog doors and cat doors purchased. In fact, when most people refer to a dog door they are referring to manual dog doors. You have a correspondingly greater selection than for motorized or electronic pet doors. Unless you have a specific need like stray cats breaking into your home, the possibility of wild animals breaking in for food, etc., we think that the manual dog door or cat door is the way to go. They're simpler; less to go wrong. They don't require keeping up with batteries or lost collar keys. They can have flexible, therefore safer, flaps. And, last but certainly not least, they cost less other things being equal. Unless you have a good reason, get one of these dog doors or cat doors.
Gun Dog House Door Company introduced the "Easy Dog Door" and the "Easy Big Dog Pet Doors" to address two problems with the original Gun Dog House Door and the Big Dog Door: First they are quieter in use and, second, they are lighter and easier to use by smaller dogs and cats.
The Petsafe Freedom Patio Pet Door for sliding glass doors differs from the earlier Petsafe Deluxe Patio Pet Door primarily by the fact that the Freedom panel uses the Petsafe Freedom flap while the older Deluxe panel used the Petsafe Classic flap.