Smile, it's the weekend! But just in case you had a rough go of it this week and your glass feels more like it's half-empty than half-full, here is a collection of 37 adorable photos featuring animals so ridiculously happy they're guaranteed to send you off into the weekend smiling.
Seriously, if we were in a punny mood we'd call it a smiley back guarantee. So scroll down and just try to keep a grin from spreading across your face as you do... we dare you!
This article was originally published on the 500px ISO blog.