My thoughts on this is that it's not what you give them that causes behavioral problems, but how you give it. We have three tall dogs, and we said right from the start that they wouldn't get table scraps, because we didn't want table- and counter-height dogs interested in our food! Well, we have changed our minds a little bit, because we have discovered that veggies are good for dogs and they love them. So, the way we handle it is to treat the human food either like part of their dinner or like a treat. They get canned veggies and yogurt every day with dinner. When we give them carrots, celery, lettuce, etc., we give make them do a trick for it, so they think of if it just like they would a dog biscuit. I think the trick is just don't feed them when you are eating. My mom used to give little bits of her dinner to my former cocker spaniel, and that dog was such a begger! I would never give another dog scraps when I am eating!