I cant see any fleas on my dog, but he scratches all the time. What could be causing him to scratch?
Unless your dog is on continuous flea prevention medication all year around, he probably DOES have fleas. Fleas are experts at hiding, and its very difficult to see them on most coats. 90% of the unknown scratching problems that I see on dogs are caused by flea infestation. Only rarely is it a skin problem or food allergy that is causing the itching.