If a neighbor’s dog follows my dog inside, will the PlexiDor Electronic allow them to leave?

The PlexiDor Electronic only activates and opens when a collar key is present. The panel will be down and locked until activated by a key.

That means that if a dog or cat follows your pet inside through the door, they will not be able to go back out until your pet opens the door with the RFID chip on their collar key.