When offering up advice in public places I sometimes include options that won’t work in a specific situation but might apply to the few dozen or thousand that might read it. That’s why I specifically mentioned that that probably won’t work in this case. And I stress “probably” because I had a “blind” cat that could see a laser. The first time I lured her into the bedroom with a laser my then girlfriend, now wife, started crying because this cat had previously only detected sun vs shadow and she wasn’t even entirely sure that was not at sensing heat thing.