Why does only one ear stand up on my dog?

Why does only one ear stand up on my dog?

One reason outside of body language for only one ear being propped up is an underdeveloped pinna. It takes time for the pinnae to grow strong enough to prop up the ear, and a dog’s pinnae might not grow equally. It is possible that one of your dog’s pinna has not yet fully developed.

Why does my dog have one floppy ear and one straight ear?

They may have one ear floppy or deformed due to malnutrition, fighting, disease, fungal ear infections such as malassezia, parasites or other causes. Some of the most common include: Bite wounds: when dogs fight it is not uncommon for the ears to be injured, since they are vulnerable and accessible areas.