Use of foraging racks and shavings as enrichment tools for groups of rhesus monkeys (Macaca mulatta) (1995)

Lutz, C. K., Novak, M. A.

Abstract

The placement of foraging racks containing equal amounts of food in random locations on the cage appears to be the most beneficial in terms of environmental enrichment. The use of racks also resulted in increased cage usage, activity, and movement, and decreased social proximity; the use of shavings resulted in decreased agonism.