Certain behaviour patterns of the wolf are briefly examined and are likened to similar modified patterns in the domestic dog, thus implying acceptance of the theory that the dog's ancestor was the wolf. The author's earlier findings on characteristics peculiar to different breeds of sporting dog are cited as evidence of the hereditary nature of many behavioural traits. " Bird dogs lift their head when following the scent of their game but hunting dogs keep their nose to the ground. Crosses behave like bird dogs since their behaviour dominates. Giving tongue when on the scent dominates over silent trailing. Willingness to enter water without urging dominates over unwillingness or indifference to water. Retrieving is also an inherited trait. Some dogs can twist their lips to give a facial expression resembling a laugh; this trait is also inherited. Phlegmatic breeds crossed with lively breeds give fairly sluggish pups.".
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