@lawrence-chow But surely the breeder paid for the vet to make sure he/she was selling a healthy puppy ?
Good news and a completely new one on me, that just one puppy in a litter should be so affected.
https://www.cdc.gov/campylobacter/outbreaks/puppies-9-17/index.html
Multistate Outbreak of Multidrug-Resistant Campylobacter Infections Linked to Contact with Pet Store Puppies