Cud Cud Cud is a portion of food that returns from a ruminant's stomach to the mouth to be chewed for the second time. More accurately, it is a bolus of semi-degraded food regurgitated from the reticulorumen of a ruminant. Cud is produced during the physical digestive process of rumination. The idiomatic expression "chewing one's cud" means "meditating" or "pondering"; similar expressions such as "he chewed that over for a bit", or "chew on that!" likely have the same derivation. The alimentary canal of ruminants, such as cattle, goats, sheep, alpacas, and antelope, are unable to produce the enzymes required to
Taurodontism dentition although the term is traditionally applied to molar teeth. In some cases taurodontism seems to follow an autosomal dominant type of inheritance. Taurodontism is found in association with amelogenesis imperfecta, ectodermal dysplasia and tricho-dento-osseous syndrome. The term means "bull like" teeth derived from similarity of these teeth to those of ungulate or cud-chewing animals. According to Shaw these can be classified as hypotaurodont, hypertaurodont and mesotaurodont. According to Mangion taurodontism may be: It has also been reported in Klinefelter's syndrome, XXYY and Down's syndrome . The teeth involved are invariably molars, sometimes single and at the other times multiple