Dog handlers and trained dogs

Some cool train dog not to bark images:
Dog handlers and trained dogs

Image by IITA Image Library
Men training dogs for security purposes at the residential areas of IITA Ibadan, Nigeria. (file name: IITA_211)
Our train dogs. May 3

Image by Thomas Fisher Rare Book Library
Creator: Tyrrell, Joseph Burr, 1858-1957
Title: Our train dogs. May 3
Date: 1899
Extent: 1 photograph:

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