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A GSD bitch with a double P1
"Premolars -Used for cutting, holding, shearing and breaking food into small pieces. Puppies do not have P1 teeth. Adults have eight (8) premolars in the upper jaw and eight (8) in the lower jaw, four (4) on each side. The premolars vary in size from the smallest (P1) to the largest (P4 upper) apart from the P1 they have a serrated crown. The most common of faults is missing or additional premolar 1 in either the upper or lower jaw, it has not been scientifically proven that these are linked hereditarily, however, there are clear bloodline connections which link these faults. While additional P1 teeth are undesirable, they should not be penalised in the show ring."
