If your Chihuahua is experiencing a seizure, it is important to stay calm and contact emergency veterinary care. After taking your pet to the vet, they may run tests to determine the cause and prescribe medication to prevent future seizures. Remember that seizures are not painful for your pet, but can be distressing. Provide comfort and monitor their diet and stress levels to reduce the risk of seizures. Stay close to your Chihuahua and be prepared to assist if necessary.