I think we are all guilty of putting human feelings onto our pets,when in reality they literally live in the moment.That's not to say they don't remember things .I'm well aware of dogs,cats etc remembering bad things etc.But I think something like seizures,there is no memory of the episode.My late brother had seizures ,sadly Alcohol induced,he didn't remember having them.He did have the aches due to muscle spasms.Sadly this was in the days before smart phones or I would have recorded them and shown him.Wehad to witness him roaring ,clenching turning blue/grey etc.Sorry to be graphic but that's what happens in some cases.