WASHINGTON — Congress has lifted a de facto ban on the slaughter of horses, a move hailed by Missouri farmers and state political leaders who say the prohibition had inadvertently caused more harm to the animals than good.

But some animal-rights activists decried the little-noticed provision, which sailed to passage earlier this month and was signed into law by President Barack Obama on Nov. 18. And they vowed to keep the issue alive, pressing for an outright prohibition of horse slaughtering in the U.S.

Um. Guys? Say nay to the horse steaks. Thanks.