Bonus: Why do domesticated animals have floppy ears?

Dogs, sheep, goats, rabbits, cows, pigs, all of these animals (and more) have floppy ears in captivity. Many of them have blotchy spots, and shorter snouts too! Why are these traits common to domesticated mammals? How can it possibly be a coincidence, when these traits are rare in the wild and don't exist in the wild counterparts of these species?

And what happens if we domesticate a new animal? Will they get these traits too?

Get the real answers on this episode of Species.

Bibliography: https://docs.google.com/document/d/1HtflGMeobqYyy23kE4qA_IZ9qB-otnYPk8gRm2rIFFA/edit?usp=sharing