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adult africa african aged aging animal animals backyard beautiful black bored boring breed breeds brown canine canines carnivore closed cute dog doggy dogs domestic elderly expression eyes face female grey head hound hounds magnificent mammal mammals matured mood moody mouth muzzle nose old open out outdoor outdoors peaceful pet pets portrait portraits rare red rest restful resting retired rhodesian rhodesians ridgeback ridgebacks rifrug senior show showing sing singing single sings sleepy south tired tongue white wisdom wise yawn yawning years