Your Pets' Needs:
Each pet is an individual as far as size, age, and agility. If he has long legs, he can step higher over the threshhold. If he is old or obese, he may be less able to hop over the bottom of the door. All of these factors affect which size door is appropriate for your pet.
- Pet Door Height::
There are two measurements to consider when deciding on the height of a door: The height of your dog or cat at his shoulders (so he doesn't have to scrape his back as he pushes through the door) and the height of the step-over that he must make.
height of your dog
- To measure your dog's height, stand him next to a wall and mark a small mark with your pencil at the height of his tallest point on the back. (In most breeds this is the shoulder area although some wolfhounds and greyhounds have a "roach" that is higher). For cats, there are usually only one or two sizes offered: a "cat" door (or small size) or (sometimes) a large cat size. No need to measure. Unless your cat is really large, the "cat" door will be appropriate.
height of the step-over or "RISE"
- To decide on the rise of your door, we need to consider how long your dog's legs are or how agile he is. A young, tall doberman can probably step over a rise threshhold of 6-9" with ease. A short, old basset hound might have difficulty with a 3" rise. If there is a step on either side of the door, the "step-up-step-down" is also more difficult and the "rise" of the door should be made smaller to compensate.
To test your pet's step-over height, place a 2x4 or 2x6 in the doorway and call your pet over it to test his ability to get over it with ease (without jumping).