Nice to hear the dog is ont he road to recovery and wasn't raped.
Your vet sounds like a tit, i would demand my money back!
I would also like to point out coughing is also a sign of a bad heart with these dogs.
They're also prone to chest problems, both of which shouldn't be over looked as they are able to treat them easy
A couple family members own these dogs and my folks also own one which is actually 18 years old and counting!