Here's kind of an addition to corgi intelligence, I think. My dogs use their noses like hands to get things, open doors, move objects, etc. I keep my dog food in the pantry, and I will sometimes tease Augie, and just open the door a crack. He will work that door with his nose, until he gets it open. He can also open the door to his crate if he wants to go in. Charlotte is the same way.