If your dog's scratching isn't caused by a parasite it may be time to look at ALLERGIES!
Yes, just like humans, your dog can suffer from allergens like mold, pollen, perfumes, smoke, medication, shampoo, and food. Allergies can make your dog's eyes runny, their skin dry/itchy or the opposite - greasy and oily - both resulting in itching, biting, chewing, and scratching! It can also cause sneezing, vomiting, diarrhea, swollen paws, and even snoring caused by an inflamed throat.