Fatty acids are specific types of polyunsaturated fats , these fats are identified as polyunsaturated fatty acids (PUFAs). These lipids have an important role in the prevention and the therapy of different animal pathologies. PUFAs biological effects on a dog’s health are best understood by understanding the biochemistry aspects of the fats. As with many nutrients the name represents some of its molecular structure, hence the number in the name of the main fatty acids: omega-3, omega-6, and omega-9 represent the location of the first double bond from the methyl group. The Omega -3 fatty acid most prominent fats are alpha-linolenic acid (ALA), eicosapnetaenoic acid (EPA) and docosahexaenoic acid (DHA). The most prominent Omega-6 fats are linoleic acid (LA), gamma linolenic acid (GLA), dihomo-gamma-linolenic acid (DGLA), and Arachidonic acid (AA). It is essential that omega-3 be combined with omega-6 fatty acids, the mixture of 4 parts omega-3 to 1 part omega-6 allows the nutrients to function in a healthy manner.