I don't find anything wrong with eating animal leftovers. I'd rather eat that than some genetically engineered, artificial something or other that could cause who knows what later in life. Why do you think cancer is more present these days> Look at the foods we eat.

Hotdogs are made from various animals scraps, and that lipstick you ladies use is made from whale fat, along with a lot of the soaps we use in the shower.

What's different that using melted down animal skin in foods opposed to eating a rump roast from a cow? Yes, a rump roast, their ass. It's all dead animals in the end, and if eating a burger doesn't bother you, I don't see why this should.