One of my girlfriend's friends is obese. Let's call her Amanda. Amanda's parents are also obese, and Amanda's mother is an LP nurse who seems to think that makes her a specialist on all aspects of biology. So, according to that family, they're all obese due to genetics (and deepfrying everything while their exercise regime involves getting in and out of their car has nothing to do with it).

Their cat recently died of diabetes. It was also quite obese. I'm not sure the "bad genes" argument can extend that far. At the very least, it would open a pretty big can of worms.

__________________
"The plan does not involve mayonaise."
"... I knew there was a catch."

You can't take the sky from me.