Cataracts are a common cause of blindness in dogs. Cataracts are a condition in the eye where light cannot penetrate the eye lens or loss of transparency of the eye lens. The purpose of writing this case report is to find out the causes of cataracts in animals, how to diagnose and the therapy that can be given for cataracts. The case animal is a Shih Tzu dog named Jojo, male, 14 years old, 8.4 kg body weight, white-brown hair color. The abnormality in both dog's eyes was realized six months ago, namely in both dog's eyes there was a bright white color on the lens, the dog had never received any treatment. In testing the pupil reflexes of the two dogs' eyes did not show any pupil reflexes to light. On examination of the 0 diopter ophthalmoscope in dilated eye conditions it was found that the light could not penetrate the fundus and at 10 diopter the eye lens looked cloudy in both eyes. On fluorescein examination, it was seen that there was no color absorbed in the two dogs' eyes which indicated that there were no ulcers in both eyes of the case dog. Based on clinical signs, the case dog was diagnosed with bilateral cataracts. The treatment plan for case dogs is giving herbal supplements, namely eyevit as much as 2 tablets a day. Based on clinical symptoms, clinical examination, ophthalmoscope examination, fluorescein test, animal cases were diagnosed with bilateral cataracts with causative factors, namely race and age with a diagnosis of dobius. Supplementation with high-quality antioxidants can be an option to prevent and slow the development of cataracts. To treat cataracts in dog eyes, cases of phacoemulsification surgery should be done.