37 Photos of Ridiculously Happy Animals Guaranteed to Make You Smile

03/06/2015 06:42 pm ET | Updated May 06, 2015

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!

For more smiley animal goodness, click here and go browsing through the happiest animals on 500px.

This article was originally published on the 500px ISO blog.