Nothing Dog just lays there. Not even a twitch.
I I didn't think it would work but oh my god it really does work my dog listens actually
So cool My dog kept on winning he stopped in like a second it was amazing
Helped my dogs from barking at every little noise.
It does not work I tried it on my dogs it didn't work
Not the best! Worked for a little while then started staying on and now no sound at all.