Measure you dog for a dog door

How to Measure Your Puppy, Dog or Cat for a Doggie DoorBefore you get started remember to allow for your pet's growth if he is a puppy and not fully grown.Step 1: Measure your pet from the top of the shoulders to the chest, just behind the front legs.Step 2: This measurement is the cutout size that determines the pet door size you need.Step 3: Determine the type of pet door you need (metal vs. plastic).Tip: Get a large piece of cardboard and cut an opening the size of the flap. See if your pet is able to get through this opening. If you get the width right you will be able to adjust the height when you install the door.