My dog has developed muscle wasting/atrophy on one side of the face, and that side of the…

Dear Doctor, My name is Gayatri, and I am from India\. I am seeking online veterinary guidance and a second opinion regarding my dog’s health condition\. My dog has developed **muscle wasting/atrophy on one side of the face**, and that side of the face appears sunken compared with the other side\. There is also **redness in the affected area**\. A few months ago, my dog also experienced **bleeding from the nose**\. I am concerned about the underlying cause of this one\-sided facial muscle loss\. Could this be related to **Masticatory Muscle Myositis \(MMM\), a neurological condition, an inflammatory/autoimmune disease, an infection, a tick\-borne disease, or another underlying condition?** ### Current medications prescribed by our veterinarian: - Tab\. Freezyme TBR - Tab\. Claupet - Tab\. Doxycycline 300 mg - Tab\. Pred - Inj\. Doxycycline 200 mg - Inj\. Pred 2 ml I would be very grateful for your guidance regarding the following: 1. What are the possible causes of one\-sided facial muscle atrophy in my dog? 2. Is **Masticatory Muscle Myositis \(MMM\)** a possibility in this case? 3. Would a **2M antibody test** be appropriate and useful? 4. Would a **CT scan or MRI** of the head/face be recommended? 5. What additional blood tests or diagnostic investigations should be performed? 6. Does the current treatment require any changes or special precautions? I have photographs of my dog and available medical/blood test reports\. I can share them online if required\. I would sincerely appreciate it if you could review my dog’s case and provide any guidance possible\. An opinion from an experienced **Veterinary Neurologist or Internal Medicine Specialist** would be extremely helpful to us\. Thank you very much for your time and consideration\. I look forward to your guidance\. Kind regards,