There is this milk which is fortified with Omega 3. I have tried every Omega 3 supplement (and failed) on my ds (age 3) and strongly believe that he would benefit from it. This milk (Advance, it's called) gives 50% of the rdi in 2 glasses, but is this worth anything at all if they are not getting the full 100%? Apart from oily fish, what foods contain Omega 3?