My 3-week-old puppy has blue eyes, discharge, and poor vision. Why?

The eyes typically open between 1-2 weeks of age. If the one is still closed and there is discharge then an exam with your vet is strongly recommended to diagnose infection, injury or congenital defect.

I recommend to get this puppy examined today. That eye looks inflamed and possibly infected. It's possible this is a congenital anomaly but the appearance of the eye looks suspicious for something is trapped in the eye (hair or or object) or that a virus has causes a painful corneal abrasion. The opacity may represent corneal edema which is very worrisome. It's possible he is in pain so get this addressed quickly. Best of luck.

It is very hard to make out the photo but I can see the blue, redness and discharge. You are right the dig needs to see a vet. There appears to be an infection going on and the blue colour either means oedema of the cornea which is the transparent eye layer at the front, or uveitis which is inflammation behind the cornea. I would suspect tgat the cornea may be damged which is very serious. Either way the dog needs a vet because at best this will require eye drops to heal but may need more extensive treatment. It is currently the owners responsibility so I would remind her of her obligation to keep the animal healthy and urge her to visit the vet.

The cloudiness may be indicative of inflammation or infection. Have Sophie examined by your veterinarian or a veterinary opthalmologist to diagnose the cause. If she is rubbing or pawing at it, place an e-collar (cone) on her until she is examined.

If she is nursing well and alert otherwise then it is less concerning and would point more to an eye injury or infection (conjunctivitis) which will need treatment. If she is weak and not wanting to nurse or interact then she needs to be seen by a vet immediately.m to see what is going on. Make sure she is kept warm and you can gentle clean her eyes with sterile eye wash. If you see any redness, mucus or cloudiness to the eye then it is best she get seen by a vet

Some puppies will open their eyes later than other puppies. If there is no discharge from the eyes, mucus or matting over the eyelids, it seem like the muscles around the eyes 'blink' even though his eyes are not open, and he's eating and otherwise thriving, he may just be slow to open his eyes. If you see any of the signs I mentioned above, there is a medical reason behind why he isn't opening his eyes, and you need to take him into your vet.

If she is weak and not doing well then she needs to be seen by a vet to determine the cause. She could have an infection, parasite, or congenital abnormality. Your vet may be able to prescribe medications to help. You are going to need to continue to supplement her with a puppy milk replacer if she is not eating on her own. Hope she gets better soon!