I'm working on a system for the deer that jump my fence and eat everything. Current plan is a servo to unlock the dog door, an audible ding to alert the dog, a

I'm working on a system for the deer that jump my fence and eat everything. Current plan is a servo to unlock the dog door, an audible ding to alert the dog, and a treat dispenser that releases a treat once the deer is gone. The treat would be in the house, and retrieving it would relock the door. I will just have to make sure to turn it off during rut!