All these symptoms are showing that your dog is suffering from ringworm. It is a fungal disease and it needs to be cured at once by effective treatment. You can get rid of this problem by giving your dog bath with Neem Soap or Neem Shampoo. Rub Neem Oil on its skin. It will remove ringworm in few days. Another useful way is to boost its immune system. Give it well-balanced high quality diet, which should be rich in protein. Add into it fresh fruits and vegetables. Fish oil is also helpful. You can also use evening promise oil to cure it.