Novel and economical structural enrichment for a unique colony of group-housed macaques: Success and failures (2002)

Felts, W. P., Johns, T. J., Sauceda, R.

Abstract

Social enrichment provided by group mates seems to overwhelm the effects of inanimate enrichment. With this thought in mind, rather than provide traditional puzzle or chewing devices, we designed structural enrichment. Different levels of perching and visual barriers were installed. ... These economically structural changes increase the activity in the units and decreased the amount of injuries caused by fighting.