I've been feeding Garrus by hand and putting my other hand on him or putting the food in it because I want him to learn that my movement means more food not me taking it. When he snaps which isn't often I sternly say no, put him in his crate until he's calm and start again. Since he focuses on the bowl I haven't been feeding him from it. I work with it separately. I put it down and tell him to stay and then I move towards it and put a treat in it and release him. I repeat a few times. When I take it I hold it and put one more treat for him to take while I'm holding the bowl. I'm trying to show him that my moving towards the bowl means good things. He seems to be responding well.