Lignophagia

Lignophagia is the abnormal behaviour of chewing and eating wood. It has been recorded in several species, but perhaps most commonly in horses where it is sometimes referred to as `wood chewing`. Lignophagia is a type of eating disorder called pica in which normally non-nutritive substances are chewed or eaten. For some animals, wood is the norm.....
Found on http://en.wikipedia.org/wiki/Lignophagia

lignophagia

An abnormal chewing and eating of wood, seen in horses in restrictive quarters. ... Origin: L. Lignum, wood, + G. Phago, to eat ... (05 Mar 2000) ...
Found on http://www.encyclo.co.uk/local/20973
No exact match found