I think you should take her for a vet check if this isnt normal behavior. She may really be in pain and its coming accross as depressed because dogs are good at hiding pain. Thats where I would start at least. If vet check turns out okay Id find new and interesting things to do to get her attention like obedience and playing little games like tug of war and hide and seek. Also now in the winter my yorkies are more passive and not as energentic so it could be that also. I try to take them on small errands with me and just playing with them periodically to give them something to look forward to |