Extra Large and Giant Breed dog doors are not as common as the smaller sizes. For those customers who have giant breed or even extra large dogs, you know how important it is for an adequately sized pet opening. Our larger friends tend to get arthritis and hip ailments more easily, not to mention aggravating injuries that can become more serious. A dog door that is large enough to provide enough room to navigate freely through the opening minimizes injuries and provides your dog freedom even in their later years.
The correct size of a dog door depends on the size of your dog. Sounds easy enough, but this is how we recommend you visualize the pet opening in relation to your dog's height.
You will want a dog door that when installed will be mounted high enough that the top of the opening will be 1.5 to 2" higher than your dog's back. The bottom of the pet opening should be low enough to the ground so that they can easily step through without dragging their legs or having to step too high. If the pet opening is not adequate enough for their size, then you will run the risk of your dog inuring injuries as they use the small opening. These injuries tend to develop into larger problems, especially among the larger breed dogs.