The Healthy Breeds Black Russian Terrier All in One Multivitamin Soft Chew is a 4-in-1 tasty soft chew that supports healthy digestion, skin & coat, hip & joint as well as contains essential vitamins and minerals to supplement your dog’s diet. The formula is formulated with good bacteria and ingredients to serve as a probiotic digestive aid. The black russian terrier is a medium sized dog that is perfect for any household.