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Also, here are some commercial RF-licensed images that match your search criteria:  
Ruff Royalty Free Stock Photos
Author: Lukyslukys
Ruff Royalty Free Stock Images
Author: Witoldkr1
Ruff Stock Photography
Author: Razvanzinica
Ruff Royalty Free Stock Image
Author: Anna3571

Explore more commercial options: More Ruff Stock Illustrations & Vectors | More Ruff Stock Video Footage