It depends on what type of collar you're speaking of. If it is a shock collar for owner-absent barking, how else can the collar be effective if it doesn't cause pain?
There's not enough information in your post to recommend any collar, and you should hire the services of a CERTIFIED dog trainer before employing one.
There's not enough information in your post to recommend any collar, and you should hire the services of a CERTIFIED dog trainer before employing one.