by Nutramax Laboratories, Inc. is available for dogs and cats, is rich in omega-3 fatty acids. Welactin is a high-potency natural salmon oil supplement for dogs. Welactin can benefit your pet by helping to maintain normal heart rhythm, protect kidney function, supports the nervous system and skin health as well as the immune system. It’s a highly palatable formulation that helps slow down the effects of aging. Welactin is tasty and easy to administer to pets.