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Shiloh (the dog from the book Shiloh by Phyllis Reynolds Naylor) is a Beagle.
A Shih Tzu, also known as the Chrysanthemum Dog, is a toy dog breed, weighing around 5 to 8.5 kilograms when fully grown. The exact origins of the breed are unknown, but it is thought to have originated in Tibet and then been developed in China.