crew. 1  Ella Andersonas Piper. 2  Dan SchneiderCreator. 3  Dana OlsenCreator.  Dan 1  SchneiderWriter. Dana OlsenWriter.
Epilepsy is a brain disorder in which a person has repeated seizures over time. Seizures are episodes of uncontrolled and abnormal firing of brain cells that may cause changes in attention or behavior. Epilepsy occurs when permanent changes in the brain cause it to be too excitable or irritable. As a result, the brain sends out abnormal signals. This leads to repeated, unpredictable seizures. (A single seizure that does not happen again is not epilepsy.)
1 Brain tumors are a very common source of seizures in older pets. Itâs very unlikely your 12-year-old dog or cat will develop epilepsy. If you have a pet getting up in years who starts seizing, unfortunately, the likely cause is a brain tumor.  Bacterial, viral, fungal and parasitic infections can also cause seizures.