Terminal as in how much longer? he's a good lookin fella' I'll say that!
The blood condition and current symptoms give a 3-6 month window.
It is likely that he has had this for a long time. He has had a recurring symptom that we treated with mild medications. (He has seen three different veterinarians over his life.)
I am not being given many plausible options. I believe that I will probably start with baby aspirin on him just to minimize stroke, lung and heart issues.
I may also learn to use a hyperdermic to blood let and rehydrate.
I am waiting for the vet to get back to me. He's researching options. I asked about baby aspirin, he will check the database. I think he said that they have a few case studies online.
Since he's not a purebred, those case studies will be a shot in the dark, in some ways.