The U.S. Justice Department challenged the deal on Aug. 31, citing competition issues.

Miller challenged the deal, citing a state law prohibiting livestock processors from having control over hog suppliers.

But some investors have challenged the deal, saying the payout is too low and want it to get more scrutiny from a federal judge.

U.S. regulators have challenged the deal, which has already won the green light in Australia, China, Colombia, New Zealand, Saudi Arabia, South Korea and Turkey.