Apple Cider Vinegar for Dogs

My loving Jack Russell Chihuahua is 16 years old. He started getting tumors on his head, legs, side and I started applying apple cider vinegar to these tumors. The largest one on top of the head is gone too. I apply with apple cider vinegar and water in a spray bottle and I apply it as needed for disinfectant. I love my baby boy all pets have lived way pass their last expectations.