 While DHA and EPA are very important and have major implications in cognition, they are not considered essential as dogs are able to synthesize them from ALA.However, the conversion rate is relatively low, and supplementation of DHA and EPA is often helpful.Sources of DHA and EPA are also generally less widespread, and although most of the market sources of these PUFAs are from fish and fish oil, they can be sourced from algae for a vegan formulation.