DEAR MISS MANNERS: My husband and I were raised not to put more food on our plates than we would eat, and to stay seated during a meal unless we asked to be excused. Our adult daughter’s boyfriend was apparently taught differently. He fills his plate to overflowing, though he is very picky and never finishes his food, and actually takes extra meat to give to my daughter’s dog. He doesn’t talk to us during the meal, and whenever he is done, he just gets up and leaves to feed the dog. We find this to be rude! The waste also bothers me. We have spoken to our daughter about it, and she replies tha…