Big Fat Blog has an excellent take-down of an ABC article and video concerning an 11 year old who is sneaking food. http://www.bigfatblog.com/what-do-about-your-fat-kid-sneaking-food.
One of the comments said, quite accurately, "It seems to me that the first "fact" to acknowledge - is that any child who sneaks food is, first of all, hungry, and, second, anxious about the likelihood of being able to get enough food. I would think that an 11 year old would not have the cognitive ability to articulate this." She is absolutely right. As a pre-teen I would often sneak food, usually things very high in sugar/calories, and keep them in my closet where I was pretty sure my mom wouldn't find it; icing sugar and brown sugar are the things I remember right now, though there could've been more. My potential blood sugar problems were undiscovered and I had no idea what was up with me, I just knew I NEEDED these things and if I asked for it or took it openly I'd be denied and probably yelled at. I can also remember hitting the fridge late at night, after everyone was asleep, for weird things like lemon juice or soya sauce. At the time, and even now, I don't know why I'd need those things, but I did. There's so much about my upbringing that I'm only realizing now was screwed up, food being only a part of it, because I have other families and parents to compare it too.
The final paragraph over at the Big Fat Blog is particularly heart-wrenching, as I wish MY parents had got that advice too; "listen to your daughter. Talk to her about what's going on and try to figure out what might be bothering her. Hug her...a lot. Remind her that you love her no matter what, and that you will always be there for her. That kind of thing will go a long, long way. In the end, the most important thing to remember is that your job here is about providing unconditional love and support."