Kristel Richard / A Khampa woman farmer holds two baby Tibetan Mastiffs, near Huangyan, in the Garz Tibetan Autonomous Prefecture in the Sichuan Province, China, June 2010
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Ian McCarthy / Silhouette of mastiff dog crossing a bridge with Himalayas in the background, Upper Dolpo, Nepal
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Nick Upton / Spanish mastiff guard dog (Canis domesticus) wearing a metal spiked carlanca collar to protect it from wolves, protecting a herd of sheep on pastureland above the Lakes of Covadonga, Asturias, Spain,...
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Jane Burton / Bull mastiff portrait.
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Petra Wegner / English Mastiff male, portrait against white background.
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Petra Wegner / English Mastiff male, portrait against white background.
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Petra Wegner / English Mastiff male, portrait against white background.
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Petra Wegner / English Mastiff male, portrait against white background.
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Petra Wegner / English Mastiff dog sitting with English Cocker Spaniel, male.
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Petra Wegner / English Mastiff, male, sleeping against white background.
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Petra Wegner / English Mastiff male, sleeping against white background.
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Petra Wegner / Mastiff, male, portrait against white background.
