Imagine being trapped in a silent, empty room with nothing to do, day after day. For many animals in captivity, this is not ...

A commercial puzzle feeder loaded with 10 whole peanuts is tested in two single-housed adult males. Average time spent foraging from the feeder was about 15 minutes.

The influence of an environmental enrichment feeding device (puzzle feeder), on activity and behaviour patterns of captive orang-utans, gorillas and chimpanzees was studied at London Zoo. General ...