u/Jawdennns

I came home after a weekend trip and my girl who has been paralyzed for the last three years is having constant tremors in her back legs and lower back. She can spinal walk usually but is not now and when I stand her up she pulls her left leg up so it stays bent and bobbing. She was also napping and it was lifting on its own.
She is acting normal otherwise. Eating, drinking, sleeping and expressing like normal. Just this constant shaking. Her right leg seems more stiff and straight than normal and the left is bent not wanting to straighten.
I'm going to take her to the vet tomorrow but trying to think what this could be.