Most skin problems are not emergency, it is important to to find the real cause for the infection. So if your dog is scratching or licking excessively, or if you notice any changes in your pet's coat or skin, including scaling, redness, discolouration, or bald patches Please get in touch with your vet. . Once the cause is identified, most skin problems respond well to treatment. Supplement should be given to the dog with the advise of the vet for a certain period.