We had a beagle that had seizures. The vet told us it was akin to epilepsy.
There was no harm to the dog. He was just out of it.
We got some doggie barbiturates if we could catch the early warning signs. It happened every three or four months. Nothing linking the events together.
Dogs, like people, can have epilepsy, and there is some apparent relationship with the “smarter” breeds having a greater incidence of it. I have personal experience with a Sheltie and I know of several Border Collies (the smartest dog by most accounts). As you know, poodles are also very smart.
In my Sheltie’s case, it was controlled by medicine that had no apparent side effects, he was eventually weaned off of them, but this was after he had the equivalent of a “grand mal” that affected him badly for monthsi.