Hi. I know that scrap foods and cooked bones (chicken) are bad for dogs, but my grandpa keeps on feeding his german-labrador those foods and we tried to tell him not to but he doesn't listen. It's already getting on my nerves, but I think he would yell at me if he ears me saying the same thing again. I love that dog so much. What do u think should I tell my grandpa that wouldn't make him feel bad?