"The correction needs to be delivered the moment your dog begins to stare at someone waiting for eye contact. The level of the correction also needs to match the level of intensity and drive of your dog."

Wait... what? Correct a dog for waiting for eye contact from some one? Personally, I like my dogs to be focused and excited and watching me. I don't want my dog to be afraid to look at me. Also, does this mean that a dog like a Border Collie, a breed who ALWAYS has intensity in their eyes, should be walloped extra hard? Ugh.

"If you notice stiffness in the body or staring deliver a correction. Don't be harsh or angry with the dog but just grab her attention. She'll be happy to cooperate with you as long as she understand what you want from her."

WHY do you have to correct a dog to grab their attention? There are countless other ways to distract a dog and divert their attention without involving pain and possibly creating a whole assortment of other problems from giving those corrections.

Correcting a dog does not tell them what you want from them, it tells them what NOT to do. You're telling your dog "don't look at other dogs like that", "don't give other dogs a warning growl", "don't make eye contact"... or I'm going to hurt you. Additionally, what makes you think that the dog has the cognitive ability to realize that you're correcting them for being guardy, rather than them just associating the correction with being around other dogs period? Resulting in not just resource guarding, but full on aggression. I suppose the aggression wouldn't surface if you really, truly affectively keep your dog in a shut-down mode. But who wants that in a dog?

"Mine!" is an amazing book! Jean Donaldson is great. Fozzie is naturally a very independent, self-sufficient guardy dog. He was like that from the moment I adopted him. He will always let me take anything from him like Heidi, it's so much easier to deal with human food guarding, because you can hand feed and trade, while you cannot do that with other dogs. First, set her up for success. DO NOT leave out anything that she can get posessive of with other dogs. In a controlled situation with Heidi leashed and other dogs leashed nearby, feed her yummy treats and praise her. Make it clear that the other dogs are not allowed to take the treats that she's eating. Slowly do this closer and closer to other dogs, and break her off completely (by walking away and putting the treats away) if she seems stressed or tense at all. Eventually work up to feeding her treats with one hand while feeding another dog treats with the other. I've done this with Fozzie, very successfully! He can lick the same plate as any of his dog friends without giving a hoot.

As far as going to the dog park, do so during a quiet time of the day and don't offer her food or attention for now. Just let her interact and socialize without feeling the need to protect you. Don't sit down, walk around and body block her/walk away from her if she gets protective of you.