Hi all, We have our chickens in a secure run and henhouse. I want to fence off a grazing area for them, but still allow our dogs to wander in and out of that part of the yard (the dogs are perfectly well-behaved with the chickens, and love them). How can we set a gate into a fence that a dog can push open, but then will swing back closed? It has to swing BOTH ways, so the dogs don't get trapped back there Thanks!!!!