Can Dogs Get Hi By Blowing Smoke At Their Ears?

Technically yes it can. Dogs and most other animals have a Eustachian
tube that connects ear to throat. Inner ear infections can cause nasal
Secretion so one could assume smoke absorbed in the ear simultaneously
combined with the dog inhaling could get THC from the smoke absorbed by
the dog's lungs.

No they can't it's not possible the only way is if it was in their nose