Symptoms Of MIM (PSSM2)- Muscle Twitching (Quarter Horse)

In this series you will see raw footage of PSSM horses displaying symptoms details for this video are as follows below:
Breed: American Quarter Horse
PSSM Test Results: MIM (PSSM2) (N/P3)
Symptoms that can be seen in the video: Muscle twitching in the shoulder
Notes: This mare also presented with facial atrophy, canter issues, and muscle atrophy.
Prognosis since video: This mare is doing much better on PSSM2 management, and is doing trail riding.