I just went out to feed and milk and noticed my three month old doeling acting a little off. She wouldn't eat her dinner and is standing off by herself. She walked around and drank some water, but is not her perky self. I'm worried sick, especially since I lost her sister to what I think was listeriosis six weeks ago or so. None of the same symptoms so far, maybe I'm just being paranoid. Should I intervene now or just wait and see how she does?