.option { font-size:16px !important; } Tens of millions of animals are used annually for research, testing, and education throughout the United States. Facilities that breed, hold, or use animals for ...

Beck, A. M., Meyers, N. M. 1996. Health enhancement and companion animal ownership. Annual Review of Public Health 17, 247-257.

A few chimps will use sticks or. Barnett, C. 1997. A gravity roulette feeder for chimpanzees. The Shape of Enrichment 6(2), 11.

In an [successful] effort to reduce abnormal behaviors, especially regurgitation and reingestion, and promote higher activity levels [locomoting and playing], straw and scattered forage material were ...