Quote Originally Posted by AdoreMyDogs

Graham has (probably) what's called histoplasmosis.
It's a fungal pnemonia.

They can only confirm his histoplasmosis if they do an asperation
of his chest/GI tract, but that's not necessary.

If it is this disease ...
This all sound a bit "iffy" to me ...
and just "waiting to see" if he gets better - that can loose some valuable time.

As others have suggested -
I'd suggest a Second Opinion - from either a Vet School or a
very well respected, multi-vet clinic.

There are articles on "histoplasmosis" on the i-net -
but be sure you specify the Canine variety.

Here's one: http://www.mold-survivor.com/canines.html

Please ask around to find a suitable hospital or clinic to seek a Second Opinion.

{{{Hugs}}} from Phred