I have a mallard hen at work and she will not leave her nest for anything. Not food, water... nothing! There is no sign of the Daddy. We took Mama some water, but she won't respond to it. When we first noticed her she would hiss at the sight of us. Now she looks empty. What should I do? Can I help her? I thought maybe the Daddy was hurt and she was giving up due to a broken heart. Do you think she and the nest will be okay? I hope tthis is normal. Please advise, Thank you.