steve is food aggressive. i tried to do everything right by him when he was a baby- hand feeding, dropping treats in his dish while he ate, never giving him reason to feel he needed to guard his dish, but he still ended up a food guarder (food bowl, peanut butter stuffed kong, fresh real bones). when it first surfaced i'm pretty sure he would have bitten me if i'd pushed him. i started at that point throwing cheese at him while he ate. some of his meals i completely hand fed to him, one small handful at a time, requiring calm sitting puppy to get food. once he was showing a soft, loose body with that, i fed him handful by handful but put the second handful in while he was still eating the first. sometimes i'd drop extra bonus yummies in, but mostly i worked just with his food. when he was comfortable with that i'd put his bowl down with food in it, release him to eat, and then come back numerous time through the meal to drop bonus cheese on top. now he looks up at me when i approach instead of hovering stiff over his bowl, but it certainly didn't happen overnight, and if i slack off too much, he reverts.
it's no fun and to be completely honest, it hurts my feelings. but it's something we can work with. just remember to go slowly and don't push your dog. don't give him reason to fear the hand approaching him- give him reason to look forward to it.
ironic that i've never had these problems even remotely with my adult pit bulls who came off the streets, eh grammy?