If you’ve tried everything and your dog is still afraid of the clicker, you can still train using a marker (which is all the clicker is), except that you will want to think of an alternative type of marker, one that doesn’t make a loud click. Such as your voice saying “YES” instead of clicking. A clicker is just that – a marker to mark the correct action. If a clicking marker frightens your dog, use a voice marker instead. Same concept. Different tool.