James Herriot is called to treat Tricki, a small dog owned by Mrs. Pumphrey. Tricki has become hugely overweight due to Mrs. Pumphrey's excessive pampering and overfeeding. Herriot hospitalizes Tricki and puts him on a strict diet with no food, only water, and allows him to play and exercise with other dogs. Through exercise and playing with other dogs, Tricki loses weight rapidly and transforms into a fit and muscular dog. When Mrs. Pumphrey collects Tricki after two weeks, she is overjoyed with the recovery and thanks Herriot, mistakenly believing he performed surgery on Tricki, calling it "a triumph of