11-year-old female with cystic fibrosis was admitted with failure to thrive after losing 3 kilograms (6.6 pounds) over the past two weeks. This started following a hospitalization because of pneumonia, and the client could not regain the weight. The client's parents agreed to a short hospitalization to collaborate with a nutritionist, intravenous (IV) fluids, and other treatment interventions. On exam, the client is alert and completely oriented. The client has a sunken eye appearance, very dry and flaky skin. Brittle hair and nails were noted. Very thin appearance. No cardiac murmurs were noted, and some rhonchi in both lung fields. Productive cough noted with clear sputum. Bowel sounds were hyperactive in all four quadrants. The client reported no pain.