What causes bloodshot eyes in puppies?

A puppy's eyes should be clear, with no red coloration to the whites. There should also not be any heavy discharge, discoloration, cloudiness, or tearing in your puppy's eyes.

The most common condition in dogs and puppies that causes red eyes is Conjunctivitis, which is an inflammation of the mucous membranes of the eye. The eye reddens because of the increased flow of blood, and there is sometimes also swelling of the mucous membranes. Causes include infection, scratches, and eye irritants like smoke or dust.

It's also possible your puppy has a prolapsed third eyelid.

Nobody can diagnose your puppy online. Treatments will vary depending on what the problem actually is.

You should not delay in having your puppy examined by a veterinarian.