Not every critter instinctively understands how to use a cat flap:

im-stuck-dog.gif.pagespeed.ce.0jwQ73qFI7

But Ruby, an orphaned baby wombat adopted by an Australian family, is pretty quick to pick it up:

[youtube=http://www.youtube.com/watch?v=J58a3Wg4hTs]

Bonus: Here’s a video of Ruby playing with a dog that is, if anything, even more adorable:

[youtube=http://www.youtube.com/watch?v=PZaMmksySyQ]