Your dog is displaying resource guarding and perhaps to him the rawhide is of higher value than his food. I don't know. But whatever the case, he needs to know that you are not a threat to his stuff and that you are very clearly his leader and he mustn't do that. So, what you do is a program starting now. This will help him to get a clearer picture of who's whom in the family.
http://www.sspca.org/Dogs_TANSTAAFL.html
Put the rawhide away for a while (actually, I don't like those either....can cause intestinal blockages) Get something else that he likes and don't let him have it 24/7. Ask for a sit before you give it to him. Have some special treats in your pocket. (cheese chunks or meat...tiny pieces) Get your playful, fun mood going first. Wooooo hooooo! Let's play a game. You hand him his toy or bone. Start with lower value items, but something he still likes. Then hold a treat out for him, but he has to "give" you the toy first. Then he gets the treat. "Yeah!!! wooo hooo! gooooooood boy!" Then "take" (put toy back in dog's mouth.) Then "give" back and forth trading the toy for a treat. Then make the game even more fun. Throw the toy a short distance and entice him to retrieve. "come on, bring it here." Hold the treat out for him and trade. Make this a game and make him see that you are not keeping his toy. He's going to get it right back again. BUT....be careful you do not reward if he is growling at you. Don't scold, but don't give the treat. If he still is reluctant to give you the toy, that means the treat isn't as good as the toy. You can upgrade the treat or downgrade the toy to a lesser valued item. He should be willing to give the toy for the trade of a treat and a whole barrel of fun and games.
Do other obedience training besides....all positive methods, motivation, reward....make it fun. He'll respect you more and look up to you as his guide. He'll understand that you are no threat.
Then after you get this going....get your child to tell him "sit" and then praise and treat. Your child can give him his dinner bowl, but first your child must tell the dog, "sit." And only when he sits does she put the food bowl down. Always supervise your child around the dog...always, always, always. But having her involved a little bit with some training commands and controlling his food and toys will make the dog see that all humans, children included are his guides and leaders and to be respected.
You can also work on "sit/wait" before the food is put down. The dog does not get up until you give a release word, such as "OK." (whatever) If the dog bolts before released, quickly pick up the bowl. Repeat until he figures it out that unless he waits for the release, he does not eat. You are controlling his very valuable resources in a calm, civilized, non-punishing way. This is the sign of a true pack leader. You are not threatening or putting the dog on the defensive by harshness. Alpha wolves are not harsh. It is "understood" that they are the leader and they do barely any adversive tactics.
So, do practice obedience skills every day a couple of times....not too long each time and little commands here and there throughout while you're doing your normal day's activities. When you're doing dishes, ask for a sit/stay. While there's a commercial on TV, practice a long down stay. (treat often and periodically, saying, "goooood down, gooooood stay.") don't make him stay too long at first. Set him up to succeed and gradually lengthen the time he is to stay. Always use a release word when the exercise is over. Never give a command you can't enforce. If he breaks the stay, don't punish him. Simply replace him in the down/stay and start again. If he breaks the stay, it means you made him stay longer than he is ready for. Keep him there a short time at first and make him succeed so you can praise him for that and he'll understand better that what he did was what you wanted. This is how I trained Lyric and now I can stand 200 feet away from him in my pasture, hiding behind a tree for 3-5 minutes and he'll down/stay in spite of quite a few distractions. Be patient, motivate and reward.
I hope this helps. These things....obedience practice NILIF, working with your dog, firm, insistant, following through, consistant and fair will teach your dog that he does not need to make any rules. That job is taken. You're going to set the rules and he will become glad to follow them. No dog wants to be dominant. They only become aggressive when their leader is not a clear "alpha." They feel helpless if they don't have a clear leader and then feel the need to take on that role. This is what your dog is showing small signs of now and you can nip it in the bud in the way I described. Do not use aggressive means to over power your dog. This is NOT the way it's done.
