VetriScience - Supplements for Dogs & Cats - Canine & Feline Renal Essentials PRO Bite-Sized Chews - 60 Bite-Sized ChewsThis holistic formula helps maintain normal kidney function by supporting renal circulation, immune and antioxidant defense system functions, homocysteine balance, normal fluid retention, stress management, liver functions, and normal detoxification. Astragalus root powder supports kidney circulation and immune function, while the Chinese herb Rehmannia supports kidney and liver function and is known as the "kidneys own food." Other ingredients like