Pet Doors business. Provide the door to let pets out when nature calls. Business Overview There are estimated to be more than 30,000,000 house pets in North America. And if you have a dog or cat, then you are well aware of the fact that they may have to get outside for a host of reasons. Unfortunately, once in a while our schedules conflict with our pets' call to nature conflicts. Enter the solution: the installation of a pet door enabling dogs and cats the freedom to enter the...