Every morning for the past month, Catarina Antão has been busy supplementing diets for sixteen underweight orangutans by providing them with “bubur” (porridge). A recently qualified veterinarian from Portugal, she volunteered at the Care Center for six weeks and was interested in improving the diet of the orangutans, especially the underweight ones. Facilitating weight gain is important for a number of reasons. Low body weight could weaken orangutan immune systems and make them susceptible to illness.