Does not appear to have any effect on…
Does not appear to have any effect on either of my dogs. The lights flash, but it makes no difference to either dog. I called customer service and was told that if the lights flash the device is working. From what I see it is not doing anything that has any effect on a dog; we got it to try and reduce barking (something their website claims to correct) but the dog looks right at the device in operation and keeps right on barking. Customer service said that for them to check it out I need to pay return shipping; I would have no problem with that except that there was no offer of sending me a replacement unit if I returned this one. Very poor customer service.