I had not heard that rhubarb was toxic for cats, and can only tell you that the tea certainly seemed to work for Jacob. I also gave it to our other senior cat, Rusty, who just passed away this January at age 20! I have read many other positive stories about the effects of Essiac tea on cats and dogs and can only assume that if rhubarb is toxic, the doses are small enough not to matter or any toxicity is lost when the rhubarb is used in combination with the other herbs/plants in the Essiac. Best of luck to you and your cat!
Our cat, Jacob, was diagnosed with osteocarcoma (bone cancer) in 2000, and was given 3 months to live. We were told the cancer would metasticize and spread to his lungs very quickly, as this was the most aggressive kind of cancer. We started giving him Essiac tea, one teaspoonful in his wet food twice a day, and the cancer did not metasticize. Jacob in fact lived a happy life until November 2005, when he passed from cardiac arrest at age 15. I have always wanted to share this information, but until I found Earth Clinic, I was never sure how to get the message out there! This is an amazing resource tool - thank you for being there!