I cannot stand when people use the doorbell! What I 'think' is a contributing factor is the steps/motion they hear outside the front door, then, a bell from somewhere BEHIND them....that makes them say, "wait a minute, I know someone is at the front door, and that is why I am focused on it, now, I hear the rear noise, and I don't know what to do".

I don't think I would work on desensitizing him...it might be more of a shock. And, since you usually 'catch' someone before they ring it, it really isn't all that frequent, is it?

Poor boy, hiding in the tent. Send him a soft little kiss from me.