She sounds very fearful and anxious and likely it's from human trust issues. Some dogs are not food-driven but anxiety will cause dogs to ignore treats as well.
Does she eat normally?
Will she readily come to you on her own and cuddle or readily come when called?
If she does come to you, what is her body attitude when she does?
__________________  Jeanie and Tibbe One must do the best one can. You may get some marks for a very imperfect answer: you will certainly get none for leaving the question alone. C. S. Lewis |