A pair of dead chickens were found on the Upper West Side for the second time in four months — suggesting a secret religious ritual is at play in the ritzy nabe, according to experts. The two lifeless golden-feathered birds were discovered Tuesday morning, laying head-to-claw along the median on Broadway and West 91st Street, West Side Rag reported. These birds likely originated from one of the 80 live slaughter markets that operate in the Big Apple, with many testing positive for deadly disease, according to the activist. “More than two dozen live slaughter markets in New York City have tested positive for avian influenza this year as well,” Di Leonardo said. “It is illegal for live slaughter markets to sell live birds to the public, however, we know live slaughter markets regularly violate public health codes by selling live birds to those who slaughter them in the streets, often for cruel and inhumane animal sacrifice,” he added.