The cause of Plummer-Vinson syndrome is unknown; however, genetic factors and nutritional deficiencies may play a role. Women are at higher risk than men.
Soothes itchy ears. Diluting apple cider vinegar with 50 percent water provides a solution for a common dog problem: itchy ears. Just use a cotton swab or gauze pad soaked in the diluted vinegar. If itchy ears continue, your dog may be allergic to something in his diet.
1 While they kill all the fleas feeding on your pet, they do not prevent fleas.  Mix vinegar into their water. Don't try this with cats, as their pH is much more sensitive than dogs'. Mix a tablespoon of apple-cider vinegar into the dog's water bowl, or bathe the animal using water and vinegar.