When it comes to pet dogs, there are plenty of breeds. Some of which small like a kitten and some others can be even tall as your elder child. Some are black, some are white, some others have elegant beauty spots all over the body. The primary consideration one makes while opting to care for a pet dog is whether to choose a big or small one.
If your dog is big, then you need to select a big dog door also to cater to their needs. If you own a Great Dane, then you cannot get away with the same pet door, which may cater to Yorkies or Chihuahuas. Not all the pet stores will be catering to the needs of large-pet owners with an adequate size door, so you need to be very keen on going to a pet shop with a broader catalogue or with the option to custom design pet doors.
The popular categories of large pet dogs in Australia are;
Black Russian Terrier, Bloodhound, Curly Coated Retrievem, Doberman Pinscher, Irish Setter, King Shepherd, Landseer Newfoundland, Bull Mastiff, Neapolitan Mastiff, Rhodesian Ridgeback, Saarloos Wolfdog, Anatolian Shepherd Dog, Great Dane, Irish Wolfhound, Polish Greyhound, Scottish Deerhound, Spanish Mastiff etc.
If you have a dog, which is in any of these categories or in similar species, then the first thing to do is to take perfect measures of your dog. The important measures are height of the dog, width of the widest potion of its body (usually the width between shoulder blades), height from floor to bottom of abdomen (to set the height from floor to the bottom of the pet door). You can make a sample with these measures on cardboard and take it along when you are on to shopping for pet doors.
Another important thing while choosing larger pet doors is safety. As the opening is big, you need to consider one with special features to ensure protection from any intruders, energy efficiency, and easy installation.