We have had our ducklings a little over a week (now three weeks old) and have been thrilled with them and their personalities. Sadly, we lost one today. Now the sweet girl we have left has become totally stressed and fearful. She is calling for her friend, biting and won't come near us. I am at a loss as to what to do for her, I'm afraid of losing her to stress. Is there anything we can do to regain her trust?