14 is probably old enough to say they should make a change. Teens dont get a pass in my book. By that time they can assert some level of independence, and all these fat fucks we make fun of who are the size of planets were most assuredly fat kids. Its hard to get that fat without a lifetime of training. The point is that at some point even if your parents are dumb and fat you should gain some sense of yourself and stop being fat.