My dog has unequal pupils and one eye is draining, what's wrong?

Hello and thank you for contacting Petco Pet Education Center, formerly Petcoach. Oso definitely should be fully checked by your local vet. Difference in pupils size can be caused by ocular trauma (for example blunt trauma to the eye when Oso hit the bench) or less frequently, by brain concussion / brain trauma. Your vet will be able to distinguish between these two problems and recommend treatment, if required.

Thanks for using Petco Pet Education Center, formerly Petcoach! I think the right eye looks slightly larger than the left eye because of the pigmentation of the left eye. I do not think there is anything wrong with her eye at least based on these pictures. However, I do think that she is seriously adorable! If she develops any discharge, redness or excessive blinking, have her evaluated by your veterinarian for further assessment. Otherwise, she is likely going to be ok. Good luck and have a good night!

Hi there! Thanks for using Petco Pet Education Center, formerly Petcoach! This could have been due to some degree of mild trauma. If she is otherwise doing well, and the size of the pupils normalize in the next 24-48 hours, then she is likely to be just fine. If no improvement is noted or she worsens, then have her evaluated by your veterinarian for further assessment and treatment. Good luck with your girl!

Poor pup! Cloudiness and anisocoria (the medical term for unequal pupils) are signs of a significant eye injury. It would be best to have Massimo examined by an emergency vet tonight if possible. If this isn't an option for you, he should be seen by your regular vet first thing in the morning. Prompt assessment and treatment is important in cases like this because the risk of permanent damage or vision loss increases the longer he goes without treatment.

Thank you for contacting Petco Pet Education Center, formerly Petcoach with your question about Bear. Oh no, poor girl. I'm quite worried about the breathing and unequal pupil size. The unequal pupil size is known as anisocoria, and it's a medical emergency when it happens suddenly. She really does need to see a vet now. Please take her into an ER vet clinic; if there isn't one in your area, there will be a vet on call for emergencies. The information to reach that vet is found on a clinic's answering machine or website. I hope this helps!

This can be a sign of an eye problem - the eye can dilate if a toxin has been ingested, or it's possible that the other pupil is actually constricted secondary to pain or a scratch on the eye. I'd recommend seeing your veterinarian for an exam of the eyes. If Nova seems to be painful or disoriented I"d recommend seeing an emergency veterinarian today.

This is a medical condition called [anisocoria](https://www.tuftsyourdog.com/doghealthandmedicine/dog-has-different-sized-pupils/) - most of the time, it indicates either a neurological problem or an injury to one of [the eyes](https://www.petcoach.co/article/sight-development-in-the-dog-puppy). However, occasionally in some puppies this condition may occur intermittently with no obvious cause and no other symptoms associated with it - the cause is as yet unknown, but the puppies are otherwise perfectly normal. If this is the first time you have noticed this, I would recommend taking Tucker to a veterinarian or [veterinary ophthalmologist ](https://www.acvo.org/)for an exam to be on the safe side - he may have an eye or head injury, some type of neurological disease, or been exposed to something toxic that could cause this. If his exam is completely normal and he shows no other symptoms, then in the future you could choose to simply monitor at home for other problems.