LOL! This post imagines alien children on different planets playing an educational game called “Dog or Not?”. It simply shows pictures of various four legged mammals and asks if they’re a breed of dog. But the game becomes popular with adult aliens and starts causing problems:
https://cheezburger.com/2376709/not-a-doggo-22-hilarious-tweets-from-we-rate-dogs
Reminds me of a comment I once heard about a Chihuahua: “That ain’t no dog, that’s a rat on stilts!”