I have used the spray ones and they were effective but you have to keep replacing the spray. I also have the other type that you can set the intensity of the shock. I've never heard of an ultrasonic that really worked. The shock ones work if you get it on the dog right. I have a new one that I will sell. I no longer have the dog. Anne, TN On Dec 14, 2007, at 5:01 PM, Betsy Reinier wrote: > A friend of mine is in need for a bark collar for his German Shepherd, > 1 year old this month: as the neighbors aren't to happy that he barks > most of the night. I know there are ones that are Ultrasonic and > others that spray. Has anyone used them, and what one would you > recommend? ============================================================================ POST is Copyrighted 2007. All material remains the property of the original author and of GSD Communication, Inc. NO REPRODUCTIONS or FORWARDS of any kind are permitted without prior permission of the original author AND of the Showgsd-l Management. ALL RIGHTS RESERVED. ALL PERSONS ARE ON NOTICE THAT THE FORWARDING, REPRODUCTION OR USE IN ANY MANNER OF ANY MATERIAL WHICH APPEARS ON SHOWGSD-L WITHOUT THE EXPRESS PERMISSION OF ALL PARTIES TO THE POST AND THE LIST MANAGEMENT IS EXPRESSLY FORBIDDEN, AND IS A VIOLATION OF LAW. VIOLATORS OF THIS PROHIBITION WILL BE PROSECUTED. For assistance, please contact the List Management at admin@xxxxxxxxxxxx VISIT OUR WEBSITE - www.showgsd.org ============================================================================