My four year old Border Colie had a siezure last night, it lasted about a minute and a half. He lost bladder control, was foaming at the mouth and was spasming uncontrollably. To my knowledge this is the first time it happened and scared the hell out of me and my son. I thought for a second he might have gotten into some poison but it was my son who said seizure. After the dog came out of it he was confused for a while. Could this be a one time event or is this a sign of things to come?