In vitro, probably. A whole lot of promising research in vitro never pans out. Same with research in mice not panning out in human trials. Dogs, now if it works for them, there’s a very good likelihood that it’ll work for people. Practically all of our good cancer treatment regimens came to us through veterinary trials on dogs.
Another one that evidently has shown success in fighting cancer are the leaves and bark from the Soursop tree. However, it also has only been tested in vitro.