I had forgotten about the two dog angle; dogs don't really pay attention to separate food bowls!
Our younger cat, Annie, used to leave Louise's canned cat food alone. Annie was rescued by the vets up the street and was raised on dry food. However, since I have started adding a nutriental supplement to Louise's food, Annie keeps wanting to eat it, and there is hissing and growling galore when Annie approaches Louise's food bowl!
What dog food do you use for yours? I think my little dog has the same problem. It doesnt matter how often I bathe him, a day later he is still stinking up the place. I dont know if its because he chooses to roll around in things or what, but if its food allergies, Im willing to give it a try.