Heads up, meat eaters: A new report has rated the antibiotic use in the meat of 25 top fast-food or “fast casual” restaurants, and the results are, well, concerning. The report by Friends of the Earth, the Natural Resources Defense Council, and four other consumer health organizations, examined antibiotic use as well as the restaurants’ transparency about their meat and poultry supply chains. Chipotle and Panera were the only chains to publicly report serving a majority of meat from animals raised without routine antibiotics.

The Centers for Disease Control and Prevention calls antibiotic resistance one of the top five health threats facing the nation, killing an estimated 23,000 Americans each year. “When livestock producers administer antibiotics routinely to their flocks and herds, bacteria can develop resistance, thrive, and even spread to our communities, contributing to the larger problem of antibiotic resistance,” the report explains. “The worsening epidemic of resistance means that antibiotics may not work when we need them most: when our kids contract a staph infection (MRSA) or our parents get a life-threatening pneumonia.”

In addition to sending each company a survey, the report authors examined company websites and other publicly available information. They intend for the report to be updated annually as companies change their practices.

Here’s a rundown of what researchers had to say about each restaurant (emphasis added):