You want to go to a vet and first get a neurological examination (to make sure the episodes aren???t from say, seizures), blood work (could the episodes be due to kidney issues, diabetes?), X-rays (is there a tightness in his chest that is causing this discomfort that translates into his sleep?), and the farthest end of the spectrum you can ask for a Neurologist and getting an MRI, where you can g