If you’re a dog owner (or dog lover!), you know different dog breeds have different average lifespans. Great Danes live somewhere between 6-8 years on average, whereas Chihuahua’s live 16-18 years! This wild difference in lifespan corresponds very closely with the dog breed size. And it’s our fault.

I made a longer video to explain this! It’s here: https://youtu.be/fundOLJehWA