The subject invention provides unique feeds for non-domesticated captive wild browsers, including zoo animals. Compositions of the subject invention provide fiber having a structure that is particularly advantageous for captive browsers and the like. The subject invention surprisingly provides cottonseed hulls as a preferred feed for captive browsers. This source of fiber is also provided in an amount that is effective for treating (or preventing) acidosis and similar digestive disorders in captive browsers. These compositions and the methods disclosed herein surprisingly provide a very simple and economical solution to preventing and treating acidosis and the like in such animals.