I’d like to install a pet door, so that my two dogs could get outside into the dog run by themselves. But after I spotted a rather large snake trying to get inside the house, I changed my mind.
If you’re snake-free, have need of a pet door and don’t like the traditional flap design, a company called My Kitty Korner sells a nifty patented hinge that lets you do this to your door:
I admit it’s a bit ugly, and too small for my dogs besides; but if a compatible size were made with an anti-snake feature, I’d think about picking one up.