My 7 month old son is 90% breastfed 10% formula. I read that he needs 11mg of iron a day. I also read that it isn‘t in breastmilk, but he hates to eat cereal and I think that is his main source of iron. I have tried mixing it with fruits/veggies, gerber juice, water, and formula/breastmilk, and he still doesn‘t like it. Is there somewhere else he can get iron from?