$380? Weird.
We took our dog to the vet because we suspected he was becoming diabetic. Vet tested his urine. Vet tested his blood. Confirmed. Vet kept him for a day to test his blood sugar every hour to help adjust how much insulin he needed. Vet ordered special food for us, with a "if he doesn't like it, bring it back and we'll refund you for the unused portion" - which they did. And the vet ordered another special type of food and sold it to us cheaper than I could purchase it anywhere else (including online).
And, my vet bill was well under $380.
Vet drove out to our farm a month or so ago - drew blood samples from 20 goats. Even with the house call, and the cost of sending all the blood samples to a lab elsewhere in the state (plus the costs of the tests), and the hour or so spent getting those samples... plus updated the rabies vaccine on two of our dogs - also less expensive than the OP's ear infection.
I don't have a vet who dishonestly charges $60 for having a dog step onto a scale, and calls it a "wellness check."