Mr. Sockies for Chimpanzees (2001)

Howell, S. M., Fritz, J.

Abstract

The Primate Foundation of Arizona (PFA) makes Mr. Sockies for chimpanzees. They consist of a food treat (popcorn, pretzel, crackers, etc...) knotted inside a sock or small piece of fabric (10' or less). The legs of old jeans work well. The knots should be very tight! Once the knots are untied, the treat is secured and the chimpanzees still have the small piece of cloth to use as a sponge, wadge, or toy.