"I don't know if you've posted a video or not, but I suspect your pup may be "flat-footed" or "duck footed". It can cause your pup to drag his feet, instead of walking on his toes like a normal dog."
"Droopy eared dogs are more likely to get ear infections due to dark, moist environment a floppy ear provides for bacteria. It's why the ears of wild dog species prick up quickly. Docked tails can hinder balance as well as social cues to other dogs.…"