Videos of animals having birthdays

I'm fascinated by these videos of animals having birthdays, started by this especially surreal video Xeni sent me of a skunk named Peaches celebrating her first birthday. Do the animals understand that it's their birthday? How, precisely, does one celebrate an animal's birthday? Sometimes it's a big party for the owners, but sometimes it's just throwing a cupcake to a pig in a driveway. There seem to be a lot of different animals having different kinds of birthday celebrations memorialized on YouTube, and I've collected a few in this playlist.

It's actually my birthday today, and in lieu of the usual wall posts I've asked my Facebook friends to send me videos of animals having birthdays. If you find any good ones, add them to the comments below!

Animals having birthdays playlist on YouTube