Um punishing a dog for growling will NOT make them aggressive in my experience. Growling is not acceptable in my house and will not be tolerated unless the person deserves it.

If they are being a naughty puppy, it's BEST to teach them it is NOT acceptable to growl unless you are in a really bad situation and if the OP is planning on kids or has kids it's best that she plays with the food bowl a bit.

Unstable genetics is what causes aggression in dogs.. if you don't discipline your dog for growling the dog will think it's OK when it's not acceptable behavior to growl at the hand that feeds it. You should be able to take anything away from your dog.

I would understand if the dog was starved and scrounging on the streets for food and then was rescued; but this is a VERY young puppy we are talking about here. Better to put your hand in a dog's food bowl as a puppy than to try it when the dog is full grown and you had them since a pup. Like I said I think this dog would benefit from NILIF.