I was looking on Amazon for a cat supplement for my 12 year old cat. I saw one that said it also helped with flea control. I ordered it. The next day something felt off. I looked at the 1 star reviews one of them said it contained Oregano which is poison to cats. I researched Oregano and ALL FORMS AND DOSAGES are toxic to cats. How can they sell this stuff!! I was given a credit by Amazon and threw the supplement away.