Why Are My Dog’s Eyes Red?

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When it comes to your dog’s eyes, you will need to ensure that they are clean and healthy. If they are not, this can lead to potential health problems. It is so important to regularly check your dog’s eyes to ensure that they are nice and clean.

From time to time, you may notice that their eyes are slightly redder than normal. While this is often nothing that is too concerning, sometimes this can be a sign of potential illness or disease.

Given this, it is worth taking a closer look into the potential reasons why your dog’s eyes might be red. Knowing the potential causes can help you to figure out what is wrong with your dog, and whether they need to receive veterinary care.

Reasons Why Your Dog’s Eyes Might Be Red

As we have already touched upon, there are many potential reasons behind why your dog’s eyes might be red. Sometimes the redness will go away in a day or two, in other instances it may be persistent.

Below, we have listed some of the more common reasons why your dog’s eyes may be red. However, it is important to note that this is not an extensive list. If you have any serious questions or concerns surrounding this, we would always recommend talking to your local vet. 


One of the main reasons why a dog’s eye will appear to be red is due to inflammation. Inflammation is almost a blanket statement when it comes to red eyes. While you may realize that the eye has been irritated because of the redness, you may not know what the cause was.

There are a whole host of things that can potentially cause redness and irritation in your dog’s eye. Even something as small as a bit of sand or dirt can really irritate the eye if it is not removed.

In addition to this, if your dog is pawing at its eye, this can make the inflammation worse. If you notice that the eye is inflamed, it is worth flushing the eye out with clean water to see if it does improve.

If it doesn’t improve after a few days, then you will need to seek veterinarian assistance to ensure that there is no serious inflammation. 


Another cause behind red eyes in dogs is conjunctivitis. This is something that is quite contagious. As a result, care will need to be taken when treating this. You will need to ensure you are washing your hands and that any other animals in the home are not coming into contact with the infected eye.

If your dog has conjunctivitis in just one eye, care will need to be taken in order to prevent it from spreading to the healthy eye. Conjunctivitis is an eye infection that is caused when there is an infection with the conjunctiva. 

With this infection, you may also notice your dog’s eyes being watery and itchy. They will need to receive medicated eye drops from the vet in order to treat this. 

Corneal Ulcers

Corneal ulcers are something that is slightly more concerning in dogs. If you suspect that your dog is suffering from this, we would recommend that you take them to the vets as soon as possible.

You will notice a lot of eye redness with corneal ulcers. In addition to this, the eye can look slightly cloudy. If the eye has received trauma, this is when an ulcer can form. While it can be treated, great care needs to be taken when it comes to the healing process. 


Interestingly, dogs can suffer from allergies. There are many allergies that can cause red eyes in dogs, however, there are some commonly known allergens. These allergens include things such as pollen, grass, dust, and dust mites. 

If your dog is allergic, their eyes will flare up and become itchy. In many cases, after a few days, when your dog is no longer exposed to the allergen, the red eyes will calm. However, if this is something that is persistent, we would recommend seeking veterinary advice.

Injury or Foreign object

In some, more extreme cases, a dog’s red eye can be caused by injury or a foreign object. This injury can vary significantly depending on how severe the trauma was. While it can be something small like a piece of dirt causing the injury, it can be something more serious such as a stick or something that has pierced the eye.

Given how sensitive the eyes are, if you suspect an injury or a foreign object that’s present, you will need to pop your dog to the vets as soon as possible. This will need to be looked at in more detail to ensure the injury is treated, and the foreign object is removed.

If an injury or foreign object is left in the eye, this is not only painful for the dog, but can have a lasting impact on the health of the eye, and even sight too. 

What To Do If Your Dog’s Eye Is Red?

If you notice that your dog’s eye is inflamed, you will want to keep a close eye on this. If the red eye clears up in a few days, this is usually a good sign. However, if it doesn’t clear up or your dog is in visible pain, you will need to pop to the vets as soon as possible. 

It is so much better to air on the side of caution when it comes to the dog’s eyes, as they are so sensitive and can be damaged fairly easily. 


We hope you have found this article useful. As you can see, there is not one singular reason why your dog’s eyes may be red. There are a number of reasons why this may be the case.

If you have any questions or concerns, you should contact your local vet, as they will be able to assess your dog’s eye.