Wow...what a great group of Yorkie lovers!

Thank you all so much for your responses and comments and advice. I took Daisy after about a month of this to her Vet who could not find anything wrong. He did a complete blood count and said she had normal levels of everything, including her white blood cell count which means there is no infection. He said she might have "false pregnancy" issues since it all started right after she went out of heat. In fact he is the one that said his own Yorkie had similar symptoms during a falst prenancy. But after 3 days and no improvement with her I took her to the Animal Emergency Hospital. They took xrays (which the vet didn't do) and did a thorough exam but didn't find anything specific to diagnose. They said that they noticed she had a couple of areas in her upper spine that seemed sensitive because she yelped when they prodded her there. But the xrays show nothing remarkable. So after that visit they just said to baby her, no stairs, hand feed her, help her up and down from furniture for a few weeks and hopefully she'll improve. Well she hasn't...she hasn't gotten worse but she still has all the same original symptoms. When I give her her medicine I put her on the kitchen counter and the entire time she is looking down low. She doesn't seem to have worse pain when her head is lifted for the meds so I just don't know. But I think I will make another appointment for a 3rd opinion tomorrow. What is weird about it all is that there are times that she does come out of this little shell she is in and I'll see a little tail wag here and there. It's usually when I am talking "puppy talk" to her and loving her with my voice. That gets her tail wagging a little bit...so we want our little happy go lucky Daisy back. Some of you mentioned that she might be experiencing problems from old injuries from the elderly lady that owned them since puppyhood. I would think that any injuries she may have had would have reared it's ugly head a lot sooner than this. We were told by the neice that had them after she died that the lady had a cane and she would use her feet and her cane to shove the dogs out of the way or if they peed she was known to kick them "across the room". I cried and cried for them when I first brought them home. Someone should have had her arrested long ago for that kind of abuse. Both of these dogs would cower and hide in corners and I thought I might have to dogs that were just unhappy pups for the rest of their lives. But I brought them out of that shell pretty quick...when I first brought them home I had to hunt them down in the house in the morning to take them outside. And within a week when I would call their names they would come wagging tails and jumping up on my legs and with their happy faces on. But there has to be some of those emotions still buried within them. I won't even yell at them if one of them has an accident...we don't yell...and they know anyway and it's usually not their fault anyway...I usually have been gone too long. My girls are good little girls and so loyal...I just can't stand this and in fact this morning...poor baby is shaking so bad and she's got that left paw up...I'm going to head out the animal hospital on the other side of town and see if they can figure this out. I'll report later today. Thanks again for all your advice and caring love for my Daisy!