Bark Collars

To what does not – bark collars work in small-sized dogs?
I have a Cavalier King Charles Spaniel 13 pounds; and it is a non-stop Barker. I was thinking about getting his neck from a non-bark, but I'm not sure how it would work to stop the barking and if it's harmful for her.
I'm not a fan of shock collars … a malfunction in my dog once and surprised all the time. Try a spray bottle when he barks. The problem is that you have to stay constantly in mind, but is a much better than non-bark collars. Another option is a short snout. It will not hurt, still can eat and drink and pants, but will make it hard for her to open her mouth wide enough to bark. Over time, all she can get used to not bark.
petsafe Standard Bark Control Collar Tips – www.petsafe.net