We had a bitch (dog) also who was very aggressive toward any other dog during feeding time. We had to put the bowls on opposite sides of the kitchen and stand guard as referee to keep them apart until a few minutes after all food was gone AND she had a chance to lick our other dog's bowl. Sometimes she would even put a mouthful of food on the floor between them and wait until he went close to it, then attack if he went near (a serious attach -- teeth bared and all-out biting). A real tease... but she also had a big sweet side and was always gentle with people (including kids).