Katie Little is a news associate at CNBC.
The struggling chain also saw its sales nosedive in the fourth quarter.
The move is aimed in part at millennial diners.
Chipotle closed the location in question yesterday, and the students have been tested for E. Coli and the norovirus.
The West Coast fast-food chain says it repeatedly asked DoorDash to cease selling its dishes.
The beleaguered fast food company will be using real butter in McMuffins and other menu items cooked with biscuits and bagels.