Welcome to Yorkie Talk. You are wonderful for giving little Benjamin Button a loving home.
Congratulations on the new addition to your life.
Some people with really tiny Yorkies use ferret harnesses.
Hairless ear flaps can be genetic, although not typical. It can also be a sign of malnutrition or a condition called "leather ear." Is the skin on the ear flap dark or blackish? That would be another sign of leather ear.