A report showing which chain restaurants use meat and poultry that are farmed using antibiotics for both growth and disease prevention showed that most chains allow antibiotic use. The two that ban antibiotics and other drugs are Panera and Chiptole Mexican Grill.
You can read the Washington Post Report here. Consumer Reports also confirmed the findings in a January 2016 magazine article about Superbugs
More information about making healthy food choices is on their site GreenerChoices