I am so sorry to hear of Alfreds problems I can well understand how it must be stressing you out. I sorry that I don`t have any answers for you and the only suggestion I have is that you could maybe take him to, if you can find one, a holistic vet? I have heard that they sometimes can have success in treating persistant problems, and in way that conventional vets don`t disapprove of either.

Prayers for Henry and you too.