"we used to live in an apartment and any noise in the hallway or from neighbors would make my dog bark. when i first got it, it worked great. after awhile, the refills got a bit expensive. and when the battery ran out, i had a hard time finding the correct battery size for replacement. by the time i replaced the battery a week later. my dog wasnt afraid of it anymore. he would then bark until the citronella ran out."
