Oh, poor baby! No, I haven't seen this kind of behavior with mine. Only when she's anxious about something which is usually a storm coming.

I hope it isn't something physical. Well, emotional isn't really any better, is it.

I hope her/his back is okay. I remember my daughter's mini doxie, Otto, just before he went down last December. He was acting really weird, anxious, and nervous. But in his case, he wouldn't go up stairs and cried at the bottom of the bed when normally he would go right up his little stairs. But that was his spine. They never would have guessed it was his back. We could not figure out what was wrong with him.

Please let us know how this goes!
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