K.M.
My son also usese the Nordic Naturals DHA product. And takes a 1/2 tsp daily. He does not have the smell at all or fish breath. How are you administering it? I put it in his "green machine" juice from "NAKED" and that I am sure disguises it taste and any minor smell as well. From what I understand from the company their vitamins are the purest of pure; and they do not contain any mercury so I was lead to believe based on what I was told by the company they are completely safe. My son will not eat "safe" fish right now; he used to when he is was smaller but has refused it for quite some time; so, I believe I am truly doing what is best for him. It has helped with language development, his skin, hair and everything. One thing I love about their products much unlike a lot of what is at the grocery story; is that their are no snythetic fillers. These are the pureset of pure vitamins and its the synthetic vitamins that you have to be worried about. Sorry I can not offer a solution about the smell that your child is experiencing.
Best of luck,
K.