About 2-3 days ago we had two Italian Greyhounds board with us. Their names are Chevy and his brother is Kompressor. Chevy is a caution-will bite dog. Kompressor is a sweetheart. We took them out for a walk and on their way back into their room, Chevy started having some really smelly, light colored diarrhea. It was like the consistency of water. Anyway, as the supervisor and I were walking around looking at the dogs, I noticed Chevy. He was desperately scratching at the door. I had a weird feeling in my stomach, and I told my supervisor that we should take him over so the doctor could look at him. He was very stressed out. I had a feeling something wasn't right. Well, all of a sudden Chevy started rolling around the room, knocking the food and water bowls over. He was as stiff as a board and his teeth were clenched and his mouth shut tight. He was having a seizure. My question is, if this happens again in the future, should I leave him alone until he stops seizuring or should I take him to the hospital once he starts??