Sorry to hear Giz just doesn't have the appetite. I'm too lazy to post the pic, but when Jack was being fussy I had a buffet out for him including junk food. If he wanted to eat grav lovers cheese junk I was all for it and just adjusted insulin accordingly. Food was the first priority. Hope he feels a bit better and gets some tasties in him.
You would think there would be more specialist vets with how long the waits are to see them.