Ceja, C., White, J. 2010. Feeding behavior of Saguinus oedipus in relation to food hardness in a zoo setting: Possibilities for enrichment? Laboratory Primate Newsletter 49(3), 10-13.

We suggest that by providing animals with food in a more natural form (i.e., not cut to a standardized size), they would have an opportunity to process the food in a manner that best approaches what would be encountered in wild habitat. By allowing our study individuals to perform these manipulations, we argue that they were able to perform behaviors that they would normally exhibit in the wild, thus possibly reducing stress.