The most common cause of blood-red eyes in dogs is cherry eye, which is a condition in which the third eyelid (nictitating membrane) protrudes from the corner of the eye. Cherry eye can be caused by a variety of factors, including genetics, trauma, and infection.
Other possible causes of blood-red eyes in dogs include:
- Glaucoma, which is a condition in which the pressure inside the eye increases.
- Uveitis, which is inflammation of the uvea, the middle layer of the eye.
- Corneal ulcers, which are sores on the surface of the eye.
- Conjunctivitis, which is inflammation of the conjunctiva, the membrane that lines the eyelid and covers the white of the eye.
If your 8-week-old boxer puppy has blood-red eyes, it is important to take them to the vet right away to determine the cause and receive appropriate treatment.