Hello I am Dr. Joey. Thanks for trusting me to help you and your pet today. I am a licensed veterinarian with over 16 years of experience. I look forward to working with you.
IF this is a new problem for your dog, then this is concerning. There are many possible causes for trembling and unwillingness to move, but the top one is pain from somewhere. Our top areas for pain that cause trembling is neck or back pain. You may be able to check for this by running your hand down her back while she is at a sit or stand, gently pressing over each vertebral process. If she shirks away or cries out, then you found the painful spot. For the next you would have her in a seated position and then very slowly and gently elevate her head until her nose points at the ceiling. Then lower until nose points at the floor. Then move to the left and right. Again, if she reacts then you found the painful area. If you find spinal pain then I must recommend consider having her seen tonight on emergency. This is super painful and really needs good medication ASAP to reduce spinal swelling, get her relief from pain, and to prevent it from worsening.
There are many other areas that could lead to pain such as a joint or abdominal. Shaking can also come from other sources such as an electrolytes problem (especially potassium). Lab work can help determine if this is going on.
I am pleased to hear she is eating for you. We worry more about increased water consumption than decreased. It may also be that if her neck hurts she does not want to lower her head to the bowl to drink.
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