Smithfield Foods is one of 20 companies pledging not to use milk or meat from cloned livestock. The pledge is a response to a survey conduced by the consumer group Center for Food Safety. Polls are showing most consumers are not comfortable with the idea of eating products from cloned livestock. A spokesperson for Kraft says the food company has informed suppliers it will only accept ingredients from conventional animals - citing surveys that indicate consumers aren’t receptive to ingredients from cloned animals.

Wal-Mart and Tyson are also banning the use of cloned animals in food products. But the pledge does not apply to products from the offspring of clones. The Center for Food Safety says 8 companies have said they won’t knowingly use food from clones’ offspring.

The Center’s survey comes after the Food and Drug Administration denied its petition asking for mandatory labeling of clones and their offspring - as well as the regulation of animal cloning as a new animal drug. That was in January - shortly after FDA ruled products from cloned cattle, swine, goats and their offspring are safe.