breakfast cereal

I was thinking about adding a box of Boo-Berry Cereal as some flavoring to my next batch of mead. Anyone have any experience with this? Does it end badly or are there pitfalls to watch out for? I was thinking I'd put the cereal in a permeable bag and let it float around during fermentation.

I brewed a 2.5 gal batch of Milk Stout with Organic Peanut Butter Chocolate Balls cereal for a club competition. I did some research and technique (mash? boil? dry hop?) and amount (4 oz to entire box) were all over the place. I figured that the mash would be the best place to deal with...