The US Food and Drug Administration (FDA) is currently considering whether it should allow cloned animals, their by-products and their offspring into the food supply. Only a small minority of US farmers are raising cloned animals, mainly because of the cost of the cloning process, which stands at around US$10,000. Most of the hundred cloned animals in the US are breeding stock; therefore the issue is currently whether their offspring and milk should be allowed to enter the food supply. A cloned animal is an identical copy of the original - the genes have not been altered in any way, so it should be perfectly safe to eat their meat or by-products, according to a report by the US National Academy of Sciences.