Every year, Jews around the world seek repentance before the holiday of Yom Kippur through an atonement ritual known as kapparot. In exchange for a donation, a rabbi gently waves a chicken over one’s head, reads a blessing, and then the bird is humanely slaughtered according to the precepts of Jewish dietary laws. Animal rights groups have repeatedly tried — and failed — to stop this ancient ritual. They tried again this year, filing a federal lawsuit in California against Chabad of Irvine, and seeking a restraining order just 12 days before Yom Kippur.