Sonic Egg dog bark control devices

[Lisette Palmer]

Please tell me if anyone has had experience with Sonic Egg dog bark control devices?

[Kaitee and Orwell]

Does your dood have an issue with barking? If so, there are ways that you could train him/her without spending money. I admit, however, that I've never heard of these devices. 

[Lynda Kamrath]

I have one but it only works on my smallest dog.  You just show it to him and he calms right down.  The other two?  They ignore it.