Omega oils are an essential part of your pet’s health, supporting digestion, healthy joints, skin & coat and overall wellbeing. NAS puppy development omega oil contains high levels of DHA (docosahexaenoic acid) which is an omega-3 fatty acid important for neural development of puppies. DHA is one of the major structural components of the brain, and it plays a crucial role in developing a dog’s nervous system and retinal function.