What attracts your dog to many processed 'human' foods is the mix and salt and sugar. It's the same thing that makes us rather addicted to fast food and junky engineered food.

If you want to feed your dog a food that she will THRIVE on, not just SURVIVE on, then feed a raw diet of raw meaty bones and muscle and organ meats. It is species-appropriate, meaning it is what her history and physiology has designed for her to eat. You wouldn't feed a rabbit a Slim Jim, would you? Of course not – rabbits are herbivores and besides that, a Slim Jim is a processed food not in a form that a creature can use. So why feed foods to a carnivore that are vegetable- and grain-based and processed into a little piece of kibble?

If you're not sure about a raw diet – and many people aren't, considering the brainwashing over the past 60 years or so by food conglomerates – then at least research it a little bit http://www.rawfed.com/myths/ while feeding your dog a high-quality, non-grain kibble, such as Taste of the Wild, Canidae Grain-Free, EVO, and many others.

A dog won't starve itself, and this food, while nutritionally superior, is not loaded with salt and sugars, so you'll have to retrain your dog to eat what is given to her, instead of being spoiled and manipulating you for something different. Even if she won't eat for 3 days in a row, offer her a bowl for 15 minutes, then pick it up after that. Do this 3 times a day and offer her plenty of fresh water. A little fast never hurt anybody and it certainly won't hurt your dog.

I hope this is helpful to you, and I wish you the best of luck! : )

EDIT: Your dog won't eat kibble – fine, but you've been giving in to that behavior for 12 years now? Then it's a training issue. If your dog is bossy concerning food, then likely she walks all over you in other areas of your relationship. Just find a premium grain-free kibble and put it down a few times a day along with a word, such as "Dinner!" or "Eat!" in a happy tone of voice.

*eat lots of fruits and veggies – raw is best
*eat WHOLE grain breads and pastas – not enriched flour or enriched whole wheat flour
*don't eat hydrogenated and partially hydrogenated oils
*don't eat fried foods
*eat lean meats (you can eat beef, but stick with flank steak, low fat ground beef, and top or bottom round steak cuts)
*eat raw sunflower seeds, sesame seeds, flax seeds – you can put them on salads or in trail mixes
*dairy is great, yogurt is excellent
*don't eat refined white table sugar (like Domino's) – use all-natural sugar or honey (even maple syrup is better than white sugar because it retains its nutrients whereas the nutrients in white sugar have been stripped out)
*no soda! drink water and skim milk
*no juice drinks – only drink 100% juice
*no sports drinks – they are full of sugars
*eat wild or brown rice – not white
*don't eat foods with corn syrup (you'll find corn syrup in sauces, spreads, desserts, condiments…)
*eat all fruit spreads instead of jelly
*eat fish