Since 1998, Fauna-Tek's patented foraging units have provided complex stimuli that reverse a long tradition of how daily nutrition is offered to these animals. Using Nature's guidelines on how difficult and time-consuming an activity foraging can be in the wild, these units provide maximum foraging time in a complex, yet progressive manner, naturally offering mental and physical stimuli. Now, the foraging needs of primates in artificial environments can be met with Fauna-Tek's "Compact Synthetic Ecosystems" in a positive and challenging way.