Sorry, Philly Chipotle-lovers: You can’t get your lunch-time carnitas fix. At least not for a while.

Chipotle restaurants in University City, on Temple University’s campus, and two locations in Center City aren’t serving pork after what Chipotle spokesperson Chris Arnold told the Washington Post was an “animal welfare decision.” The Post notes that likely means the supplier wasn’t treating its pigs in a way that met the company’s standards..

Arnold told the Associated Press that the pork option on their menu would be stopped due to a violation found during an audit from their meat distributor on Friday. About a third of the chain’s stores were hit by the outage; workers at locations in University City, Center City, North Philly and South Philly said they don’t know when the popular option would back on their menu.

@billy_penn #Chipotle at 39th and Walnut. #chipotleprobz pic.twitter.com/ezKDQ5r85J

— Dave Schrader (@dcschrader) January 14, 2015

The 20-year old company prides itself on serving fresh ingredients and “food with integrity.” In other words, Chipotle wants their animals to be au natural: without antibiotics and fed a vegetarian diet in their natural settings.

As early as last week, Philadelphia has been on the list of nationwide regions that has had all of the carnitas stripped from their menus until further notice. No specific word yet on how the city is taking this troubling blow.