I've learned that floppy ears (all animals) comes with domestication.
Floppy Ears, White Patches Symptoms Of 'Domestication Syndrome'
I love the pricked ears. All three of our Feists have ears that stand up but a lot of Feist’s ears fold over like a Jack Russell. I have never had a Carolina dog but I have heard they are awesome dogs. Dog’s with a little bit of “feral” in them seem to have a lot of good sense. LOL