[spidey]

JeanT said exactly what I was trying to work out how to say. We often CAUSE the very problem we're trying to prevent when it comes to food aggression, and it may be that this is what's happened here. Either way, I don't see how the ecollar is going to fix this problem. Punishing a dog for growling is a bad idea if you're not also addressing the cause of the growling, since you're taking away one of the most clear communication methods a dog has (you're basically telling the dog not to bother warning you before he bites you), and it's often the case that hurting or otherwise stimulating (zapping with an ecollar, or giving a hard leash correction) a dog who is already aroused can INCREASE aggression, which is the opposite of what you want.