I love my puppy and when she gets into barking protective moods for humans walking their dogs nearby, I either show her the flip flop of disappointment or baby tap her with it if she keeps barking. Recently, I only show her the flip flop and if she doesn’t calm down, throw her dog bowl water at her face. That shuts her up. The bowl of water works much better than the thong/flip flop... she's like oh fuck no...no likey.