I grew up on a farm. I've pretty much always known about rennet, gelatin... and how they make hotdogs. (When I was about 10, teachers showed a hotdog production film on hotdog day. Other kids gave me their hotdogs... it was great!) I'd love to have nothing to do with rennet or veal production, but it's too tough. I'd have to stop using all dairy products from cattle. Life without butter, milk or cheese would be hard. No icecream?? Hollandaise with margarine? I've tried tofu cheese on pizza and nachos... it's not that good.