The company amended its purchasing guidelines in 2008. It announced that it would expand its pork purchasing guidelines by requiring 10% of its pork products be purchased from suppliers who do not use gestation crates, metal enclosures that confine sows and restrict the animal's movement, and double that amount by the end of the year. It would also immediately begin purchasing 2% of its eggs from producers whose hens are not confined to small wire battery cages, and double that amount by the end of that year. It agreed with PETA that the company would issue a statement that it would be give purchasing preference to egg suppliers that do not use battery cages and to those poultry suppliers that utilize or upgrade to controlled atmosphere killing, which is considered to be a more humane method of chicken and turkey slaughter.