With scars, ticks, parasites, and who knows what? I was watching a program on the Nat'l Geographic channel a while back, and they filmed an anaconda 'naturally' catching, killing, and eating. The anaconda suffered a nasty bite from subduing its prey. Mortality, also, is high in the wild. Do you want to have 9/10 hatchlings die on you because that's the way it is in nature? I'm not about to subject my snake to unnecessary suffering or dangers just because it's more 'natural'.