Causes of red whites of dog eyes:

1. Vigorous exercise. When a dog performs a large number of high-consumption sports or training events in a short period of time, such as running, crossing obstacles, etc., the eyes will become abnormally red and swollen. This is caused by accelerated blood circulation and is a normal phenomenon.

2. Serious anger. Usually it is because the dog has eaten food that is too high in salt and fat for a long time. As long as the dog replaces the diet with a reasonable structure, it will get better soon.

3. Suffering from eye diseases. When a dog suffers from eye disease, it may also cause redness and swelling in the whites of the eyes, and even suppuration and congestion may occur in the eyes. Failure to seek medical attention in time may cause blindness.

4. Trauma. If a dog accidentally hits its eye while playing, it will cause the dog's eyes to become red due to external impact. In severe cases, it may also cause corneal ulcers and corneal perforation.

5. Foreign body stimulation. Redness in the whites of a dog's eyes may also be caused by irritation from dust, bugs, hair and other foreign matter.