A female Spitz has shivering in the hind limbs
Channel: Dr David Sing
Date: 2018-05-06

Shivering in the hind limbs

Cause will be pain from right hip arthritis and left limb medial patellar luxation.  

No need surgery for the time being. 

Blog has more information and X-rays:
http://2010vets.blogspot.sg/2018/05/3149-medial-patellar-luxation-without.html