My dog has been having seizures once every 2 months first he had one in April and then one last night.?

He is a bichon poodle x Chihuahua mix. I know to take him to a vet, but me and my father are waiting until the third on happens. Pls answer this, I would like a answer! We r planning to ask the person we got my dog if the mom had any seizures, And if it was in the brokers and sisters. My dog is only 2 years old! Thanks in advance!!!