CHAPTER IX 
A LITTLE CANINE PSYCHOLOGY 
J UST a little while ago I laid down the 
March, 1923, issue of the American 
Magazine, having finished a most en¬ 
tertaining article by Mr. Keene Sumner, 
reporting some of the chief theories of Larry 
Trimble on canine psychology and the train¬ 
ing of dogs for the different duties they may 
be called upon to perform. It was Trimble 
who trained the now famous “Strongheart” 
to take the leading part in that splendid 
screen production, “The Silent Call.” His 
theories so coincide with my own—and the 
basic fundamentals are so surely the same, 
whether it be breaking bird dogs for the 
field or shepherds for the screen—that I be¬ 
lieve nothing I might say could have more 
value than just to requote some sayings of 
Mr. Trimble’s from Keene Sumner’s article. 
He says: 
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