While I agree that a 6 week GSD pup should only get a ( killed parvovirus )
My pup was given a 7 & 1 and Corona at the breeder 12/25 - 2/7 ..
My vet at 10 weeks gave a 7 & 1 no Corona or Bordetella because the dog is not boarded and Corona in California has not been seen in many years.
Find a vet you trust and follow instructions to the tee ..
The second round went well from Sunday ..