I saw this on "I Want That, Pets."
Electronic Dog Door
A woman said she got this because she was tired of finding squirrels, rabbits, and one time a skunk
in her house when she had the regular dog door. This one opens only to your pet with a remote thingy on his harness.
I don't have one because I would not want Prince to go out without me or his daddy...we have had hawks, snakes and coyotes in our subdivision before!!