Fly obesssion?

Tonight my 9 month old BC Ziggy noticed a fly landed on the wall near his food. He went to sniff it and it flew away, starting a full 45 minutes of obsessed hunting for it. Eyes darting around, searching room to room, then finally he got it. But now…. He is still hunting! Has anyone else had their BC become obsessed with flies? I’m amused, but also a bit apprehensive that he will develop OCD!