Brown discharge from the corners of a cat’s eyes may be caused by a variety of reasons, some of the common causes include: 1. Eye infection: Eye infections in cats may cause brown discharge from the corners of the eyes. This condition is usually accompanied by symptoms such as eye redness, swelling, and pain. 2. Foreign body irritation: If the cat comes into contact with foreign bodies that may cause eye discomfort, such as dust, bacteria, etc., brown secretions may appear. At this time, the cat's eyes should be checked, foreign objects should be removed in time, and wiped with a clean towel.

3. Dietary issues: If the cat’s food is too greasy or hot, it may irritate the eyes. Brown discharge occurs from the vagina. The cat’s diet should be adjusted, choose light and easy-to-digest food, and pay attention to the nutritional balance of the food.

4. Other diseases: Certain diseases, such as cat nasal congestion, conjunctivitis, etc., may also cause brown discharge from the corners of the cat’s eyes. If the cat has other symptoms besides eye problems, such as sneezing, runny nose, poor appetite, etc., it should seek medical attention in time for examination.