How old is the puppy? :)
I agree that if chews etc make him growl, don't give them - if he was a rescue dog, he may never have been given such wonderful treats and so gets anxious when approached.
I personally would not take anything from a dog that growls, because *most* dogs - have to generalise here a bit - will see this action as affirming their original thought, that a human approaching them whilst they are eating will take their precious food away :(
I have taken bones away from my dogs, (but they trusted me anyway and i had no growly issues with them), gave them a piece of cheese and then they had the bone back, my idea was to be able to take bones away, as all the books around then said that was important. Nowadays i do things a bit differently.
As you so rightly say, any dog needs to be under control around food, and also to accept not only the "boss" person but any family member, and ideally any friend of the family, children near the chew or bowl etc.
To achieve this, you need to teach the dog to trust you and to actually enjoy the idea of humans near chews and bowls

There are several ways to go about this. One method is to simply give the dog an empty bowl at mealtime, then go near and add/throw into the bowl his food, in small bits, this is simplified but just to give you an idea. The dog after a while will learn that you + food bowl = dinner. Gradually you can get other family members to follow this routine and so on. Once the dog is oK with that (and you may feel he is OK with food bowls and is only funny with rawhide chews, but he may be giving out subtle body language such as ears back or going still) then do the same exercise with more exciting treats. Go slowly and don't rush it :)
I know there are other similar methods to try, hopefully others will post and you can pick which one you feel will suit your dog.
At the end of the day, the idea is to make the dog so confident that even if you do need to pick up his bowl, or kids go near whilst he has a chew, he will feel fine about it and not threatened.
Good luck
Lindsay