I have worked on a number of automatic opening and closing coop door designs. I just completed my latest version when I had an idea that has nothing to do with a door as security from a predator. In fact, theoretically, you could have no coop door.
Imagine coop that is raised up a few feet. And a door only accessible by ramp. Now, what if you were to construct the ramp with seesaw type mechanics so that a lightweight hen could travel across the board and up to the door of the coop. But a heavier raccoon, possum, fox, etc would weigh down the board before getting to the door opening. Sure, if two hens were following one another in line, this could potentially trigger the board but then the board would snap back and each would get unlimited chances to enter the coop individually.
One weakness would be a young predator that could weigh as much as an adult hen/rooster, but I don't know if that is even realistic. This idea probably wouldn't work in places where weasels live and predate on hens.
Essentially this is a weight triggered trap door. Instead of a seesaw, you could have part of an entrance board that has a weight sensitive trap door.
Of course there would have to be no other way an animal could gain access to the coop door other than the entrance plank for this to work.
Has anyone ever thought of something like this? And what could be some real weaknesses in a predator aversion tactic like this?
-Dave
Imagine coop that is raised up a few feet. And a door only accessible by ramp. Now, what if you were to construct the ramp with seesaw type mechanics so that a lightweight hen could travel across the board and up to the door of the coop. But a heavier raccoon, possum, fox, etc would weigh down the board before getting to the door opening. Sure, if two hens were following one another in line, this could potentially trigger the board but then the board would snap back and each would get unlimited chances to enter the coop individually.
One weakness would be a young predator that could weigh as much as an adult hen/rooster, but I don't know if that is even realistic. This idea probably wouldn't work in places where weasels live and predate on hens.
Essentially this is a weight triggered trap door. Instead of a seesaw, you could have part of an entrance board that has a weight sensitive trap door.
Of course there would have to be no other way an animal could gain access to the coop door other than the entrance plank for this to work.
Has anyone ever thought of something like this? And what could be some real weaknesses in a predator aversion tactic like this?
-Dave