what was tricky problem ? how did doctor Harriet treat him? in about 150 words.

Dear Student,

Tricki had no real ailment. It was only his greed for food and over-pampering by his mistress that had spoilt his health. He was overfed everyday and that had made him obese and lethargic. Mrs. Pumphrey was worried as Tricki had refused to eat anything. He appeared like a bloated sausage. He had bouts of vomiting and did not want to make any physical movement.
Doctor Harriet took the dog for treatment, without any medication. He let the dog play more, gave more physical activity and normal diet. This way, the dog became healthy again. 

Regards