Cause it just happened and cute animal stories are super popular.

Seems like it's just coincidence because it's a recent meme.

Could also be Google has you in a filter bubble based on browser/device fingerprint and history, but that seems a lot less likely than just the coicidence of this image of a fox with a mouthful of hotdogs blowing up various parts of the internet within the past few hours.

It's foxes all the way down.