Our Maltese Terrier had what appeared to be a decree rate seizure, paws extending, reaching straight and behind his head, accompanied by some trembling, glassy eyes. Lasted about 1 minute while I held On my way! Lap,k did not restrain, talked to him. Previously we have noted some trembling and drooling but no full on seizure. No recent head injuries known other than small bumps on the head, no changes in diet or lifestyle or environment. Thoughts?