OK, OK - we get it. The selfie trend almost went away, but - bam! - it's back and better than ever. Earlier this year, the word itself made it into Webster's Dictionary, and animal selfies led a National Geographic ad campaign. No offense to duck faces, but Nat Geo was on the right track with the whole animal selfie thing. It turns out that there's a whole world of #petselfiez waiting to be seen. Ahead, check out 21 of our favorites. Woof!