What happens to dogs during a seizure? My Dog had one and I'm so scared

During a seizure dogs feel no pain and it does not kill them unless the dog has status epilepticus is a serious and life threatening situation. It is characterized by aseizure that lasts more than five minutes. Unless intravenous anticonvulsants are given immediately to stop the seizure activity, the dog may die or suffer irreversible

Calm down and breath if u can i would take it to the vet