Are Vitamins in Salmon oils and Pollock oils for dogs?
It is true that fish oils contain substantial amounts of natural vitamin A and D, when they are derived from fresh livers for example under low temperatures. Normally when fish oil is processed most of the natural vitamins vanish going through cooking and separation process of oils, water and dry material. Fish oil producers normally add vitamin A and D3 back to the oil at the end of the processing and Vitamin E as an Antioxidant, that is crucial to reduce the risk of oils becoming rancid.
By Snorri Halldorsson
Seafood Science Expert,Director of R&D at TickledPet