Is this normal?? How can I help him?

Hey Guys,

I need some sage advice from kitty rescuers... I have an 8 month old kitten named Edmund - I adopted him from a fairly bad shelter situation at 6 weeks old.  When i got him he was kind of skinny and had coccidia (which of course I treated).  Anyway, the good part is that he's incredibly affectionate (wants to lick everyone's face), a devoted litter-box user, and finally seems to have made peace with my 4-year old kitty, Emmie.  The bad part?  He is the most determined little food-hog I have ever seen (dogs included).  He has managed to locate and rip up every bag of food I've gotten him for about the last 6 months.  It doesn't matter where I put it - in a closed closet, on top of a tall book shelf - doesn't matter.  He even tries to pry open Emmy's tupperware container of cat food.  He's starting to get a bit chubby - it helps that he's very high energy. Anyway, is this normal with cats with his origins?  Should I go ahead and switch him to adult food?  Is there anything I can do to curb this type of behavior??

Yes, it isn't uncommon when cats have had to struggle for food at an early age, and 6 weeks is early to leave your mum, poor little guy.  Still, he landed on his paws with you.

There may be someone with advice on the behavioural side, but it must be possible to put the food somewhere where he can't get at it?

I'm glad to hear that it's at least somewhat normal, and he's not more crazy than I suspected  Keeping food out of his reach is hard - obviously, I have to feed him before I feed Emmy and I have to feed them in separate rooms (or else he just eats her food), so it seemed easier to keep his food closer to where I fed him.  I guess I'm going to have to start barricading it in the closet behind the litterbox.  

Is it too soon to switch him to adult food?  It just seems easier to only have to keep one container out of his reach instead of two....