One of my fosters is biting me when I touch her a certain way, basically anywhere but her face and head. She is very sweet and social, comes to me for petting, and seems to love having her face scratched, but if I move away from her face she turns and bites me. I am undecided as to how to interpret this. Is she just telling me to stick to the face, or is she getting riled up and wanting to play? She is around a year old and pretty playful.