Veterinary oncology can be very informative and unveil some otherwise unseen connections and undiscovered research path.
For one thing, pets are exposed to the similar environment as their human owners.
Also their immune systems are better a research/drug development target than lab mice.
And eventually, we will need cancer drugs for pets. They could be developed along with drugs for humans.
And cancer is more than a genetic mutation. It is a systematic disease and needs a comprehensive context study.