Hi Jonathan, I’m so so sorry to hear that your kitty’s tumor is back. Are you aware of what dosage you are giving her? For cats with cancer, we tend to do 0.50mg/kg 2 times day-to-day on day one, Doing the job nearly 1mg/kg 2 times day-to-day by working http://districtofcbd48.getblogs.net/19452035/cbd-for-cats-can-be-fun-for-anyone