Optimizing growth early in life may change the course of clinical lung disease and lead to less morbidity and mortality in this disease. However, toddlers and preschoolers with cystic fibrosis (CF) are not meeting nutritional recommendations. Behavioral factors such as mealtime duration, family mealtime interactions and child mealtime behaviors limit dietary adherence in children with CF. Nutrition interventions that incorporate behavioral therapies have shown promise in increasing energy intake in children with CF.