According to an article published in the Wall Street Journal this week contends that meat from the offspring of cloned livestock is finding its way into the U.S. food supply.

The article spoke mostly about the U.S. beef supply, citing that clones number only in the hundreds or thousands of the nation's 97 million head of cattle. 

Bruce Knight, USDA's undersecretary for marketing and regulatory programs told the Wall Street Journal that he can't rule out the presence of clone offspring in the food supply, but noted consumers are "highly unlikely" to have consumed products from them.

FDA ruled products from cloned cattle, pigs and goats and their offspring were safe to eat. Cloning animals remains controversial, and part of the original approval process emphasized that the chance of offspring from cloned animals entering the food chain were unlikely and certainly not for many years to come.

The idea of eating meat from cloned animals or their offspring is unappealing to some consumers and advocacy groups, reports

Consumer and animal welfare groups at the very least want the Food and Drug Administration to impose labeling requirements on such products. These groups have sent many letters of opposition FDA's no-labeling position. FDA has taken the position that labeling isn't needed because product from cloned animals and none-cloned animals are not different.

As has been emphasized, cloning's economics will work against their widespread use anytime soon. Cloned animal, which costs about $20,000, will be use first and foremost for breeding animals. Of course, as cloned animals are used as breeding stock, there will be more offspring that will eventually enter the food chain, according to the   Wall Street Journal.