My Max was diagnosed with idiopathic epilepsy. He had focal seizures that I was able to snap him out of by getting his attention. His focal seizures would last from 3-5 seconds, where his head would shake and his legs would spread and slip out from underneath him. I definitely think you should get an MRI for Otis to rule out anything neurological. Max's seizures were very short, however they would occur every 15-45 minutes. It's the frequency that's important, and 3 "episodes" over the course of a week should be further investigated with testing. I'm sorry you guys are going through this.