If an animal's internal system determines that there is too much water inside it, how will it likely respond to maintain homeostasis? how do they not have science?

Anurse is in the dining room and overhears a new nurse tell a client with body dysmorphic disorder that she's much too thin and must eat more before she can go home. the client bursts into tears and runs out of the dining room. what is the best way for the nurse to address this situation?