This 14 year old FS Yorkshire Terrier has a history of chronic forelimb lameness of over one year duration. No known associated trauma. Bilateral elbow abduction. Right shoulder non-specific pain on ROM. Bilateral mild pelvic limb and right peri-scapular atrophy.
Ultrasound of the right and left shoulders show within normal limits
At this point no evidence of pathology in the right shoulder rotator cuff was found. Consider other pathology such as myelopathy or pathology within the brachial plexus or distal limb as possible underlying causes of the clinical presentation.