My dog has been acting weird. She is a chihuahua. She keeps acting likes she is hurt and when i try to pick her up she bites me hard (She never bites anyone) I thought it was weird i took her to the vet but they said she was fine. We came home and she acted weirder this time we would be in front of her and she would look on the other side of the room and she kept going under our beds,couches,chairs. She does more crazy stuff. If anyone knows how to fix my baby please tell me. I am really worried about her HOPEFULLY one of the things someone says will ACTUALLY fix my baby!