Mrs Pumphrey is convinced her beloved Pekingese is dying. James discovers that she has not been keeping her pampered pet on the strict diet he prescribed, and is forced to take the dog in while it recovers from illness brought about by over indulgence. Tristan prepares to return to university, but needs Siegfried's help to pay for his accommodation. However, his older brother is not prepared to part with a penny until he has proved he is serious about being a vet. James treats the Aldersons' prize bull, and Helen rewards his efforts with some unusual home baking.

James' workload doubles when Siegfried takes ill during a harsh winter. Among his many patients is Dick Rudd's prized cow, which has an abscess in its throat and is on the brink of chokling to death. Dick is devastated, having risked everything on the animal, leaving James determined to save the animal by any means. Mrs Hall discovers it is James' birthday, and Tristan tries his best to cheer him up by arranging a double date.