A lot of red bloodshot eyes in a dog's eye may be caused by inflammation, foreign matter in the eye, bacterial infection, etc. If you find that your dog's eyes suddenly have red bloodshot eyes, if the situation is not serious, you can use saline to clean the eyes, and then put some anti-inflammatory eye drops. If the situation is serious, you need to go to the hospital for examination to avoid worsening of the condition and even causing other eye diseases.