It's true Kogami might face problems if he needs to deal with more than one robot dog at a time. I doubt the geezer would want to face him where the Sybil system works, so Kogami wouldn't be able to blast the robots into smithereens with his dominator. Despite smoking, he has looked tough enough to kick their metal asses if it's a duel. Like has been said, the old man himself won't be a problem if Kogami can still fight, with or without a dominator. Anybody needing robot dogs and shotguns against a schoolgirl won't hold a candle to a real hunter.