Could she have gotten into your cleaning supply's? Generally they shake for three reasons cold, in pain or scared, although it can happen with low blood sugar but that shouldn't happen in adult dogs. If she is not cold and you know she is not scared then check her gums and make sure there pink and if all that is ok she might be in pain and that would mean you need to get her to the vet.
__________________ Taylor  My babies Joey, Penny , Ollie & Dixie Callie Mae, you will forever be in my heart! |