Would have liked some more info on how they counteract the risks of cloning. Firstly, a success rate of 70-80% is unheard of wrt cloning. Survival rate of clones is very less compared to the natural borns (I know that the pigs probably get killed for food, but a low survival rate could be indicative of unhealthiness too). Lastly, cloning is prone to complications during growth. (more on that here - http://learn.genetics.utah.edu/content/cloning/cloningrisks/)

I wouldn't want to eat a cloned pig. Would you?