Hi Steve,
In the absence of any other information, I'd suggest my standard approach to hemangiosarcoma. For hemostasis: Yunnan Bai Yao; for the tumor, and for hemostasis: Bu Yang Huan Wu Tang; for anti-cancer effect: Vaccinium (Bilberry extract); and then there is the usual low starch home-cooked or raw (if tolerated) diet. Lastly, vitamin A and D supplementation would not go amiss.
Erin Bannink might have some other protocols she would recommend, based on her extensive experience with cancer.
Steve