There is a regulation that states that if a LTC building has a census greater than 60 residents, the DON cannot act as charge nurse. However, that does not mean that a DON can't give meds, do treatments, admissions, or other direct patient care duties. It only means that the facility can't apply a "dual role" to a DON if the building has a capacity greater than 60.
I was a DON for years and did my share of hands on resident care, especially during emergencies or when we were short staffed...in fact, those were my favorite days!