what is the difference omega 3/omega 6? in an answer to a visitor someone suggested o/3 but said must use o/6 as well please someone explain

They are different types of Essential Fatty Acids and both are needed for good health. I'm not sure about dogs but in humans we need a  high ratio of Omega-6 to Omega-3. A lot of people are deficient in both EFA's but especially Omega-3 because our diets on the whole are lacking in oily fish (the best source of Omega-3), so many would benefit from supplementation of both types of EFA but in a ratio that favours Omega-3 to tip the balance back to good health.

Hope that makes sense.

Hopefully Tohme might be along to explain it better. :)

Kath.