What anti-fungal medication is he taking? I have had the best luck with Fluconazole as far as not upsetting their stomachs. My oldest boxer has had valley fever on and off for the past three years and has taken Fluconazole with little effect on his appetite. Good luck!
Riley (4/05) floppy, docked, brindle
Cedar (6/09) floppy, docked, brindle
River (8/11) floppy, docked, brindle
Tucker, Cooper, and Kojack running at the bridge