My 23 month old male cocker has started to what I would call fly snapping. No flys, its just like hes hallucinating. He snaps in the air and wizzies round frightened. These episodes last about 45 seconds and we get about 2 episodes early evening for the past 4 days. Wether this has relevance he will not go out for a walk at night in the dark. Gibson is a fit, healthy, happy boy so this is concerning me. Any ideas? ps I have made an appointment to visit the vet to get him checked but any thoughts would be appreciated.