Wasn't there some experiments with latex years ago???
Thing about vegetarianism is... vegetarians tend to replace meat with dairy produce.
I.e: Food products made from the lactose secretion of cows that is no longer needed to feed the baby calf that has just been slaughtered for veal.
I can understand Vegans getting hot under the collar about gelatine, but vegetarians?
My cousin went vegan for a while. He lived in a damp house. Determined not to use any animal produce at all he redecorated using wallpaper paste guaranteed free of animal products.
Then his wallpaper fell off...