Welcome to YT.
Yes, many of us have pups that have had pancreatitis.
Can you tell us more about what is going on?
What symptoms?
Was he hospitalized?
Still having symptoms aside from inappetance?
What food did the vet put him on?
Is he drinking?
Did the vet give you an idea of how quickly he should start eating? I'm sure they would be happy to.
Is he on an antiemetic or nausea?