The fast-food chain confirmed on Sunday that Carl Icahn has started a proxy battle for two seats on the board.

The billionaire investor nominated two people to stand for election. The announcement comes after Icahn slammed McDonald's earlier in the week for failing to end the use of gestation crates for pregnant pigs in its supply chain.

McDonald's said in a statement that Mr. Icahn's focus in making this nomination relates to a narrow issue regarding the company's pork commitment.

While McDonald's initially pledged to mandate pork suppliers end the use of gestation crates for pregnant sows, by the end of a 10-year period, the company has come

McDonald's said in its statement that it is on track to source 85% to 90% of its US pork supply from sows not housed in gestation crates by the end of this year, with an adjusted forecast of reaching 100% by the end of 2024.

McDonald's cited industry-wide challenges for farmers and producers, such as the COVID-19 Pandemic and the global swine disease outbreak, as barriers to fully ending the practice.

The current pork supply in the U.S. would make this type of commitment impossible.

The representatives for Carl Icahn didn't respond to a request to comment from Insider, though the investor said he would push on the issue as much as possible.

Icahn is known to take large positions in public companies. According to the company, Icahn has 200 shares of McDonald's.