Thank you everyone for all your support. It means so much to me!

Killian is still acting happy and eating, so I am grateful for that. We can see that his body is wearing down, but quality of life is still there.

Dragondawg, thanks for the suggestions. Is Leukeran a chemo drug? You think that it might do some good for the pemphigus vulgaris? He is susceptible to infection very quickly, so it may be counterindicated in his case being that a side effect of Leukeran can be the inability to fight off infection. He has a variety of autoimmune problems and liver disease. He has had (rare in dogs) ulcerative granulating and fibrosing eosiniphilic gingivitis, pemphigus vulgaris, lip fold pyoderma, a small liver, multiple acquired shunts and microvascular dysplasia causing high blood pressure in the liver. At the moment, the pemphigus is not completely gone but is present slightly. The minute we raise the pred dose by a little, Killi has stomach reactions and blood in the stool. If we lower the dose, pemphigus takes over. The other drug choices have even more side effects that would cause more harm to his liver. So we are very slightly reducing the pred to see what happens next.
He is on prednisone (20mg every other day), milk thistle, salmon oil, vitamin E, Sam-e, lactulose and a pace dose of amoxicillin, plus a home cooked diet.