Free Paper Catalog. Over 200 Styles.
free catalog   view shopping cart
phone: 800-749-9609  fax: 800-283-8045
Search for a Product
Ordering Products
 Pet Doors
   The Best Pet Doors; Plexidor
   Commercial Kennel Doors
   Better Quality Pet Doors
   Electronic Dog or Cat Doors
   Petmate Pet Doors
   MagnaDor Pet Doors
   Pride Pet Doors
   Better Quality Patio Panels
   Patio Door Pet Doors
   Energy Efficient Patio Panels

 Flaps & Accessory
   Parts & Accessories
   Replacement Flaps

 For Dogs
   Care & Doors

 Just For Cats
   Care & Doors

 Installation Type
   Electronic Cat & Dog Doors
   Through House Doors
   Through Walls
   Through Patio Doors
   Through Glass Windows
   Sliding Glass Doors Panels
   Installation Videos

 Deidre's K9 Naturals
   NorthSea Omega™

   View Shopping Cart
   Learning Center
  Request FREE Catalog

  Measuring Your Pet
  Installers in Your St / Prov
  Installation Instructions
  Sign Up for Great Deals
  Dog & Cat Links
  Pet Care Info
  About Us
  Contact Us
  What Customers Say
  Dog Door
  Print an Order Form
© 2009 Pet Doors USA, Inc.

Measure Your Pet & Choose a Dog or Cat Door

How To Measure Your Pet & Choose a Pet Door

OPENING WIDTH: a little wider then the widest part of your cat or dog.

OPENING HEIGHT: measure from the top of the shoulders to the chest just behind the front legs.

We recommend the "Cardboard Test" to ensure correct size for your pet. Using the OPENING SIZE measurement in the charts, cut a hole in a piece of cardboard, and see if your pet can pass through easily. Or wedge open a house door the OPENING WIDTH, and block off the OPENING HEIGHT (starting just above your pet's shoulder) and call your pet through. Pets duck their heads as they push open their doggie door or cat door and step through it, so ideally you should install the dog or cat door with the top of the opening just above your pet's shoulder. But any position will do as long as your dog or cat can open the door and get through comfortably.

If you have any questions please feel free to call Pet Doors USA.

Choosing a Pet Door

TWO WAY. All doors open both ways so dog or cat can come and go, and close after your dog or cat has gone through. Magnets keep them shut, except Plexidor models, which operate on a spring mechanism.

LOCKING. All dog doors have a lock or close-off cover to keep your pet in or out.  Most of the cat doors have locks that close off the access for your cat.

INSTALLING. All measurements in this catalog are approximate (and may be changed without notice by the manufacturer), so please wait for your pet door and instructions to arrive before you cut the hole.  If you are installing a large dog door thru a wall the plexidor fits between studs 16 inches on center.  If you are installing an extra large dog door through a wall call for pre-construction instructions.  If you need to install and extra large dog door through an existing wall it can be done.  Call us and we can recommend an experienced dog doors installer.

FRAMING DEPTH. Measure the thickness of the house door where you want to install your pet door. A standard exterior house door is 1 3/4" thick, so if you choose a pet door with a FRAMING DEPTH of at least 1 3/4" it will extend through your house door and cover the rough cut edges. Or it will cover the gap between the inner and outer skins of a hollow core door. If you prefer to do the framing yourself, or if you have a thinner house door or panel, we have pet doors with framing depths from 0" to 2".  All plexidor small cat doors, medium and large dog doors and extra large dog doors have a framing depth of 1 3/4".  The plexidors door units trim out the cut hole very nicely.

PANELED DOORS. The Plexidor frames are very strong.  The plexidor pet door frames can bridge the dips in the panel doors with ease.  With the lower quality dog doors you will need to build up recessed areas with wood battens or shims thick enough to make a flush surface for pet door frame.     

METAL DOORS. Use a sabre saw with a metal-cutting blade to cut hole, and use sheet metal screws instead of the wood screws supplied with door.

ALUMINUM PANELS. To install a pet door in an aluminum panel (e.g., at the bottom of a screen door), cut hole as for Metal Doors. Use small bolts or sheet metal screws instead of the wood screws.

WALLS. The framing depth of the pet door doesn't matter, as you will need to frame the depth of the wall with wood (forming a small tunnel through the wall). Then you mount the pet door frames to each end of the tunnel. The flap will be on the inner or outer end of the tunnel, depending on the model.  The plexidors have small, medium, large dog door and extra large dog door wall kits.

Keep the dooty outside. SM Use a plexidor doggie door this winter!!  You will see lower energy bills.  Being green will save your green.

What Customers Say

"Our life has been heaven and the reduction in air conditioning bills will more than pay for itself in no time. I just can’t say enough about how happy we are with the Plexidor and all it’s done for our ‘doggy’ boys and us."
---Charles and Bonnie Wallace, Texas

If you live in Texas and need a doggy door installer, call customer service Monday-Friday 10am to 4pm, or you may email us at We can locate an installer for you.

Website by FirstLink Technology, Inc.