Oily or Dry Skin
A dog with excessively oily or dry skin is likely to have seborrhea. One major symptom of seborrhea is greasy hair due to the excess oil the skin is producing. Dogs with this condition often scratch and cause hair loss, and have scaly inflamed skin with flakes and a foul odor. This is chronic in some breeds, but can also be brought about by allergies, fungal or bacterial infections, parasites and skin diseases. Solutions include shampoos or coat and skin treatments that gently remove the oil while treating the skin.