We use NuVet vitamins. We have used several different vitamins over the years. The one we really like for our Yorkie and Maltese puppies and adults is NuVet Plus made by NuVet Labs in CA. We order by phone 1-800-474-7044, order code #47142. The vitamins cannot be purchased thru the vet or pet store, only thru the company. It is available in a powder that you sprinkle on food or a food wafer. I like the food wafers, the dogs think they are a treat and gobble them up. The NuVet Plus vitamin are made with human grade ingredients. The vitamins are supposed to reduce the risk and eliminate problems such as scratching, itching, hot spots, allergies, arthritis, premature aging, low energy levels, cataracts, digestive problems, heart disease and tumors.