I own a four year old female rat terrier named Tinker Belle. In the past week she has developed a strange new beahvior. She is refusing to go outside. When I let her and our other two dogs out she sits in her cage and shakes. When I try to coax her out she snarls at me, but never growls. I have tried everything from putting their water dish outside to walking out with her, but she always runs for the door to get back in. She used to love going outside, I have never had to make her go out before. She used to love to play frisbee with me outside. Please help!


