Recommend Salmon Oil Supplement?

[JasperJ]

Hi, can anyone recommend a salmon oil supplement I can add to my dog's kibble? He's on Purina Pro Plan sensitive skin formula, which we're going to switch, and we add a bit of wet food to the mix. I used to add sardines but he stopped eating the food after a few days of that. I can try the sardines again but would also like to try an oil. I've also just started adding a raw egg to his food every 2 days. We've only had him a few weeks so we're still getting to know him.

He has a bit of dandruff and dry skin. We groom him regularly and he gets plenty of exercise. He's a Lab/Shepard mix, likely. His picture is in the dog characteristics forum.

Thanks!