lol - I had to vote other because when they are all outside together and ready to come in, Skye just lets them in! She ingeniously figured out that the little handle thingy pushes down and opens the door, so she jumps up and lets herself in! And of course, everyone else follows. I'll have to get a movie of that! Otherwise,

Chloe - barks
Venus - jumps on the door
Sahara - jumps on the door/learning to open it too