English Mastiff -- Masticatory Myositis

[Jethro]

Hello everyone, I hope someone out there can help me. I have three English Mastiff's and love the breed, but my youngest (he's 2) has just been tested and is being treated for Masticatory Myositis. I read a bit on the internet about this autoimmune disorder and he does exibit many of the signs -- won't eat, can't open mouth very wide, drooling even more than normal, white blood cell count is elevated and is currently on prednisone.

My question to those of you who know about English Mastiffs -- have you heard of this health issue in the breed, what are the likely outcomes since he's not really responding well to the prednisone (he is now staying by himself instead of with us), and is there anything else that you believe could be wrong with him instead of the Masticatory Myositis since he was initially taken in for a swollen eye and then this was uncovered. Any help you can provide is greatly appreciated. He's my baby and I don't know if there are any vet specialists in the NY/NJ area who are familiar with this problem.