[YorkieMother]

If it is the sound that is concerning him then you can use a tin top of a pickle jar or a pen that clicks or for now just your tongue.

I would teach him first that the sound means food not that he is working. so click treat click treat click treat and pass it fast so he is not being asked to wait to take it. SO click and hte hand swings in to feed from up high not with the treat in his fast. It is called loading the clicker.

You can also find an I click which is a softer sound. I tend to use them so mine does not sound like every other clicker although older wise clicker dogs understand yours that others my baby right now flips her head around to others in the class when they click as she looking for thier treat. once I worked the i click she kow moine only caused the treat on her action.

Also you cna tape the clicker of stick it in something until he gets used to it.
You did not do anything wrong, he was just surprised by it.

If you want to start agian have him on one side of the room and you on the other and click and treat nad toss the treat to load and then start shaping from a distance.

JL