IME garlic should be only use every week or 2, and vita, have their doses, some fish don't seem to mind, but ours seem to take them in either or, but not both, if we add both none of them seemed to want it, but teh best ican say is try, if they don't eat as well, then next time don't
IMO some will tell you otherwise, they did tellus , but as i said, it won't hurt, and then you will know
HTH