Map of Canada Tourist

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Deafness can be caused by severe ear canker and inner-ear infection. Tumors growing deep in the ear canal can interfere with hearing. As a dog approaches 10 to 11 years of age there is a decrease in the acuteness of his hearing, since the nerve controlling the hearing degenerates. There is no cure. Gradually he is unable to hear voice commands. High-pitched whistles can then be used for commands. A deaf dog can also be directed by stamping on a floor; he feels the vibrations and responds to them.

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