![](http://www.rhinoresourcecenter.com/style_images/1/cat_arrow.gif) | Bryk, J.M.; Bain, M.J.; Dennis, P.M., 2011. The effect of variable feeding trials on activity, animal welfare, and management sustainability in captive black rhinoceroses (Diceros bicornis): a pilot study. ACVB/AVSAB Veterinary Behavior Symposium, p. 67
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