Hi, our GSD "Holly", unspayed (yet), will be 3 in July, is acting odd. There is this one toy- a rubber toy- that she fusses over. She does not do this with any other of her toys. She likes to have us throw her a toy and she catches it in mid-air. But this one, she chews on, then whines, cries and groans. Like she is highly upset or in pain. We have never seen her do this before, she just started it about a week ago. She is not in heat. Always at night, never during the day. Any ideas?