9 Signs Your Dog May Need a Neurological Evaluation for a Possible Brain Tumor

Not every dog with these symptoms has a brain tumor—but  changes in your dog’s health and behavior should never be ignored. Early evaluation can help identify the cause and determine the best treatment options.

1. Your dog has a new seizure.

One of the most common warning signs of a brain tumor is the sudden onset of seizures, especially in middle-aged or senior dogs that have never seized before.

• NOTE: If your pet has any of the following, please take him/her to the nearest pet hospital for emergency treatment:

• Clusters of 3 or more seizures in a 24-hour period.

• Sequential seizures with no return to normal consciousness between episodes.

• Any seizure that lasts for more than 5 minutes.

Questions pet pawrents may ask:"My dog has never had a seizure before. Could this be something serious?"

2. Their personality suddenly changes.

Has your happy, social dog become withdrawn? Are they hiding more, sleeping excessively, acting unusually aggressive, or no longer interested in playing?

Questions pet pawrents may ask:"Why is my dog's behavior suddenly so different?"

3. They seem unsteady or keep stumbling.

Brain tumors can affect balance and coordination, causing dogs to wobble, stumble, cross their legs, or appear weak. 

NOTE: Balance issues in an older dog can be an indication of old dog vestibular disease. 

Questions pet pawrents may ask:"Is my dog just getting older, or is something else happening?"

4. Their vision appears to change.

Walking into furniture, missing toys, difficulty finding food, or acting startled may indicate vision changes caused by neurological disease.

Questions pet pawrents may ask:"Can brain problems affect my dog's eyesight?"

5. One side of the face or eyes looks different.

A drooping face, unequal pupil sizes, abnormal eye movements, or changes in facial symmetry can indicate a problem involving the brain or cranial nerves.

Questions pet pawrents may ask:"Why does my dog's face suddenly look uneven?"

6. Symptoms seem to get worse over time.

Brain tumors often cause progressive neurological signs as the mass grows and places increasing pressure within the skull.

Questions pet pawrents may ask:"The symptoms started small but keep getting worse. Should I be concerned?"

7. Your veterinarian recommends advanced imaging.

An MRI is the gold standard for diagnosing brain tumors and other neurological diseases. It provides detailed images that cannot be seen on standard X-rays.

Questions pet pawrents may ask:"Why does my dog need an MRI instead of X-rays?"

8. Your dog improves on steroids—but only temporarily.

Some dogs experience temporary improvement because corticosteroids reduce swelling around the brain. While this can help relieve symptoms, it does not eliminate the tumor itself.

Questions pet pawrents may ask:"If my dog feels better on medication, do we still need more testing?"

9. You simply know something isn't right.

Owners know their pets better than anyone. If your dog is acting differently and neurological signs are developing, trust your instincts and seek a neurological evaluation.

Questions pet pawrents may ask:"Am I overreacting, or should I have my dog examined?"

Remember

These signs do not automatically mean your dog has a brain tumor. Many neurological conditions can produce similar symptoms. However, new or worsening neurological changes deserve prompt evaluation by your veterinarian or a veterinary neurologist.

Questions pet pawrents may ask:"Is there anything that can actually be done?"

Many owners assume a brain tumor means there are no options. In reality, treatment may include surgery, radiation therapy, medications, or a combination of therapies designed to improve quality of life.

Early diagnosis provides the best opportunity to identify the cause and discuss the most appropriate treatment options for your pet.

For more on seizures, visit VNIoC’s blog and our page on seizures in cats.