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Quote: Quote: The approximate age of sheep can be determined by the teeth, as illustrated above. At birth, lambs have eight milk teeth, or temporary incisors, arranged in four pairs on the lower jaw. The central pair of temporary incisor teeth is shed and replaced by the permanent teeth at approximately 1 year of age. At 2 years, the second pair of milk teeth is replaced by a pair of permanent incisors. At 3 and 4 years, the third and fourth pairs of permanent teeth appear. At 4 years of age the sheep has a "full mouth." When a ewe loses some of her incisor teeth, she is called a "broken mouth." When she loses all of her teeth she is called a "gummer

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