Unless the salmon oil is coming from "Wild" Salmon then you are feeding your dog PCB's which are horrible. Google the effects of PCB's. Also, any type of oil kept in plastic bottles is leaching toxins from the plastic. http://icelandpure.com/ This company is the best option and I believe the Sardine/Anchovy oil is the best. Also, supplementing with fish oil decreases the amount of Vitamin E in the body which is why many oils have added Vitamin E. If it doesn't you should be adding vitamin E to the diet. By the way Jack, after reading what you posted on CoQ10 I went out and bought some today. The most superior/potent/bio-available one you can buy is Ubiquinol QH-absorb by Jarrow Formulas. It comes in 100 mg and 200mg. Get the 200 mg one. It's a bit pricey but I don't think one should try to choose an inferior product when it comes to one's health. You get what you pay for.