Hi, i just wondered if anyone has ever had any experience of Masticatory Muscle Myositis (mmm). My dog (french bulldog) developed acute mmm - literally overnight to the point where he could barely open his mouth. We are just back from the vets who said his mouth was difficult to open even whilst sedated. He has had a steriod injection and is going back tomorrow for a check and to begin oral steriods for the next few months. Just wondered if anyone else has ever had an experience with this and can let me know what to expect in the coming weeks/months. Thanks x