Fidovet Immunis Oil CEC OilDietary supplement suitable for all types of dogs and cats. 125ml The oils in the Immunis line are 100% natural and vegetal, designed and formulated also for the most demanding dogs and cats, with digestive problems and food intolerances. Linseed oil is a precious vegetal source of alpha linolenic acid, an essential fatty acid, which together with EPA and DHA, represent the so called Omega 3. Linseed oil also contains a good quantity of Omega 6.