Who started “Earl the Grumpy Puppy”?

Do1717, on Reddit, Jun 8, 2015. It reached 7 platforms in 11.4 years.

LineageKey steps, 11 of 18. Lines follow time and platform
Do1717First postLixard52RedditEarl The Grumpy PuppyFacebookOwner responsePeakPressPlatform jumpPlatform jumpPlatform jumpCommercialAfterlifePatient zero