"Despite McDonald's progress, Mr. Icahn has instead asked for new commitments, including to require all of McDonald's US pork suppliers to move to 'crate-free' pork, and set specific timeframes for doing so," the restaurant chain said in the news release. "While the Company looks forward to promoting further collaboration across the industry on this issue, the current pork supply in the US would make this type of commitment impossible. Furthermore, it reflects a departure from the veterinary science used for large-scale production throughout the industry, and would harm the Company's shared pursuit of providing customers with high-quality products at accessible prices."