Citronella Dog Collar How Does A Citronella Collar Work?

How does a Citronella collar work? - citronella dog collar

Hello to all. My dog always barks only sporadically in the night. I gave him water, food, always made him outside his shop before it's time to come and sleep, but he continues to bark. I even had some teething toys and played with the night, but still barking. I wonder what exactly is a citronella collar to stop the barking of the dog. I'm on strike for the barking dog, it is not clear.


Thank you.