Dan Cathy posted a comment Wednesday on Twitter criticizing a pair of U.S. Supreme Court rulings. Those decisions will extend federal recognition to same-sex marriages in the states where they are legal, and will add California - the most populous state - to the 12 others in that category.
"Sad day for our nation," Cathy wrote. He added that the country's founders would be "ashamed" of the modern generation.
The Atlanta Journal-Constitution reports the post was later deleted. Chick-fil-A officials issued a statement acknowledging the post, saying Cathy was offering a personal comment.
Cathy previously sparked controversy by speaking against gay marriage, prompting protests and condemnations by politicians.