This video clip portrays a mature dog nearing 10 years as he trots.
This clip illustrates the fore quarter impact absorption and the         
corrosponding refection in the tail as it unfurls with each and every
stride. He is still able to lift his front out of the way of the rear foot,
     and still carries his head, measure the through travel of the
rear foot
         as it passes the fore foot print.                                             

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