Dog odor is an individual, rather than a breed-specific, problem. Dog odor can be caused by diet, a wide variety of skin onditions or by the dog's physical and environmental condition. His coat that retains odor, so large, heavily coated dogs are apt to be most offensive.
The easy (nonmedical) solution to "D.O." is cleanliness: frequent grooming, bathing and maintaining fresh bedding in all sleeping areas. To some extent, dog odor is in the nose of the beholder. Some dog owners are unaware of their pet's odor; others rely heavily on deodorizers. If the odor is not caused by a medical problem, diligent cleanliness is the answer.