I may be old fashioned, but my commercial customers like to know the age. Of course, one can "mouth" them. My grandfathers learned how to in Denmark. They taught my Dad how to a century ago, and he showed me how in the '50's. Certain teeth come in at certain times in their life, and in a certain arrangement, indicating a pig to be near a certain age. Sometimes variations occur, but usually dentition is the best indicator we have - - especially after 6 months and up to 9 months of age. In the early 1900's, the USDA and some colleges printed bulletins for farmers tellin how.
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