Dr Herriot was a competent veterinary doctor. He understood Tricki's real problem In order to help Tricki, he cut down on Trick's food and made him exercise. For the first three days, he did not give him food but only water. He did not give any medicinal treatment but made him play all day with the dogs.
The narrator, a veterinary surgeon, is a capable and wise doctor. He handles Tricki properly which shows that he is sincere about his profession. He does not operate upon the dog unnecessarily and cures him by altering his diet and activities. He is a tactful person as he knows exactly how to convince Mrs. Pumphrey to hospitalise Tricki for a surgery. His decision to inform Mrs. Pumphrey to collect Tricki supports his sensibilities even though he was tempted to keep Tricki as a permanent guest.