Hi Alex, my cat Lisa has also a mammary tumour .I am able to`t obtain Essiac for pets in Bulgaria and dont`t know if it`s preserve to give her Essiac for humans.
My Pet dog hates the vet so we opted to try the Essiac https://keiranfwce862109.wikicorrespondence.com/3639293/5_simple_techniques_for_essiac_tea_for_dogs