How can I keep my neighbors cat (or other animals like skunks, etc.) from using the pet door?
A – Choose an electronic pet door. These are available for all installation types and all, generally, work the same way: Your pet wears a collar ‘key’ that the door responds to. They simply unlock and the pet pushes through as he would any pet door. You may use one of these doors to keep one animal in while letting another out. However, be careful here. Some of the smaller sizes control in only one direction. That is to say, they will not unlock for an animal coming in, but they will allow any animal that fits to go out. Others will control in both directions.