Awe poor guy
I don't think Georgie would like the jar of pennies either. He doesn't even like when we get excited about football games! I gently touch his snout and say no bark everytime he barks. It works but I also give him some freedom to bark since that's the way he communicates with us
I am sure your furbaby will come around and it's a learning process on what works and what doesn't. Good luck!