It is so nice to the human/animal hierarchy breaking down a little.
Because two neighbor dogs wanted to become friends very badly, they started digging holes under the fence separating their families.
But other family members instead decided to install a door so the dogs could get together whenever they wanted, just like human friends. Best friends are now together.
http://justsomething.co/neighbors-build-doggy-door-in-fence-so-their-dogs-can-hang-out-whenever-they-want/?fbclid=IwAR2A6rNOO-cA2N2fB2ORwOJDYhbpi9UhjKtwiZxzCCl4x5YtKGCFjHC5hzU