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.
Washing Your Dog with Apple Cider Vinegar. 1  1. Make a rinse to improve your dog's skin and coat. 2  2. Clean out your dog's ears using ACV. 3  3. Spray your dog's coat to repel fleas.  4. Bathe in ACV-soap mixture to fight 1  fleas. 5. Use a flea comb to remove the fleas.  6. Rinse your dog.
How to Add Vinegar to Water to Stop a Dog's Itching. Apple cider vinegar is renowned among folk medicine enthusiasts for its human health benefits. While there's no scientific proof of its efficacy, apple cider vinegar is also reputed to cure dogs' itchy skin and repel fleas. You can apply apple cider vinegar to your dog's skin--full strength to a 50-50 mix of vinegar and water--any time you notice the dog showing signs of itchy, irritated skin.