If your pet likes being outdoors some of the time, you know how much they appreciate having their own private door to go outside and come in at their whim. So, a pet door makes everyone happy. The only downside is a pet door may invite animals other than your own inside your home, which can be especially troublesome if a raccoon or other unwelcome critter wanders in. There’s a pet door for that, and a variety of styles of doors with features worth knowing about if you’re considering installing one. You’ll find them sold online and at pet stores….