My guys each get 2 pumps of Grizzly Salmon Oil per day (the recommended amount for their weight.) Should I be adding vitamin E to their food as well, since it's a fish oil? I've been reading mixed things. What do you guys do? Rowan is eating Acana Pacifica and Riff is getting Innova: Nature's Table Salmon & Wild Herring, if it makes a difference. I started adding the fish oil two days ago because Riff has been itchy lately, and just sheds a lot in general.