“No. They aren’t. You can only keep them for eggs in some places.”

I call bullshit.

There is no U.S. state where it is illegal to kill your own chickens or where you are restricted solely to keeping them for eggs. While California has strict humane slaughter laws ( California Humane Slaughter Act) and various localities have zoning restrictions, home slaughter for personal consumption is generally legal throughout the United States, provided it is done humanely

https://www.animallaw.info/article/detailed-discussion-legal-protections-domestic-chicken-united-states-and-europe#2D