I had a 6 year old female with a grade 2 Mast cell tumor removed. To get clean margins, we needed to do a second surgery. Then we followed up with prednisone therapy. She will be 14 yrs in Dec with no reoccurance.

Thanks all. Nice thread, some very good insight and links for more info.

He's a working dog so in pretty good condition which I'm sure will work in his favor.

Looking at the low carb/grain free food options and have already added the fish oil to his diet. We'll see what the additional pathology tells us and go from there.