Koehler gives a list of dog breeds pp. 36 52 to look at if one seeks watch, protection or attack capabilities: Airedale P, Belgian Sheepdog P, Belgian Tervuren, Bouvier des Flandres P, Boxer P, Briard P, Bullmastiff, Chesapeake Bay Retriever, Chow Chow, Collie, Dalmatian, Doberman P "one of the best choices", German Shorthaired Pointer, German Wirehaired Pointer, Great Dane, Great Pyrenees, GSD P "there is not a finer working dog than a good GSD", Kerry Blue, Kuvasz, Newfoundland, Rottweiler, Saint Bernard, Staffordshire Terrier P some, Standard Schnauzer, Weimaraner. A "P" indicates suitability for police work pp. 78 79, with Giant Schnauzers added for this purpose. Dachshunds and some Toys can also be good watchdogs. or withers, as it's called; dog heights are standardly given in this way.
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