What you're seeing are the effects of burnout, stress and compassion fatigue. Do your best to offer an extra smile or compliment and you're likely to help turn their day around. Good luck to your daughter.
@sillysweetgirl I'd like to add that my mom was a ER trama nurse for 18 years and those people are working 12 hour shifts. Every shift is usually high stress and require lots of physical and mental ability