Myositis More Condition_symptoms Dose Anyone Have A Dog With Masticatory Myositis?

Dose anyone have a dog with Masticatory Myositis? - myositis more condition_symptoms

I have three years, pittbull, and that they can not open the jaw. The vet told me that if the dose does not open his mouth in two days I have to put down. Can you help me, please.