Dog who is given nothing but junk food!?

My uncle has 2 dogs, a German Sheppard Mix & a Beagle, and all he feeds them is JUNK FOOD. They havn't had actual dog food in a looong time. It makes me so mad because this has got to be horrible for them. An average day goes like this: pancakes and bacon for breakfast, lollypops and ice cream as a treat, and pizza or cheese burgers for dinner. Food like this, day in and day out! I want to know what will happen if he keeps doing this because I love these dogs. I have a dog and would never do this... sure I've given him a scrap or two of human food, but what my uncle is doing is ridiculous!! I've begged him to stop but he wont! I bought him a bag of dog food but he doesn't give it to them.