[yorkietalkjilly]

She might just need behavior modification training so that she learns that she has a firm but very loving leader and has no need to feel territorial about any place in the home. She should not be in control of the crate or anything in your house - you should, as should all members of the family. Really, agressive behavior should not be permitted and allowing her to possess her crate could be dangerous as children can get curious or challenged by a territorial dog and, even when told not to, may reach into a dog's crate and get bitten. Since you probably don't know what kind of life or treatment she had before you got her, she may be regressing to behavior she learned in her former home. If you are not experienced in dealing with dog behavior correction through behavior modification with positive reinforcement, maybe you could do some research and find an experienced trainer to give you some advice on how to proceed. I would not "treat" her when first arriving for now as she may see that she is getting rewarded for her unstable behavior. With a little guidance from a good trainer and a lot of love and regular work with your little dog, you and your family can help this fearful sounding girl learn how to be a stable and happy dog. Best of luck with her.