My Great Dane, Faith, has been acting strange. She has taken over my daughter's rubber ducky. She takes this duck everywhere. She has decided to live in a closet in the basement, where she has a collection of things that she dragged and placed. She is not eating, except for wet food-but I do not give her wet food often. She is also whinning constantly. What is going on--it is scarring me? Shoud I taker her to the vet? Or is she going through a midlife crisis-she will be 3 in August:confused: