I just watched episode 1, season 1, of Dogtown, the National Geographic Channel TV show about Dogtown at Best Friends Animal Sanctuary in Kanab, UT. We really enjoyed it. The first episode featured three dogs: Noche, a terrier who displayed food and people aggression; Willa, a puppy mill rescued Scottie with neurological problems and a cute wobble; and Wiley, a rescued dog who loses a leg because of a hit-and-run.
I learned a lot from this episode. My hands-on experience is with small mammals/critters and cats. I don't know much about dogs other than what I read. However, this episode featuring Noche just emphasizes my view that dogs should not be euthanized for being food-aggressive alone. I remember posting last summer about an abused pit bull mother who was euthanized by our animal shelter for being food-aggressive. Well, yeah, she was starving in a crack house....duh! I believe that a dog with food aggression can be rehabilitated. If we expend the money and energy on "rehabilitating" hardened criminals, then why can't we do so with animals. In many ways, they are probably easier to change because they don't have the same emotional baggage.
I think food aggression is just an excuse to make space for the next animal.