WHY PET-O-VIT SYRUP ?_x000D_n_x000D_nDROPS with DHA Multivitamin & Amino Acids Supplement DHA : Docosahexaenoic Acid (DHA) is an omega-3 fatty acid, DHA is essential for the proper functioning of brain, for the development of nervous system and visual abilities during the first 6 months of life. DHA has long being praised as a wonder nutrient for human infants and now its being found to boast healthy brain development in puppies.