Bark Before Quiet

To teach a dog to be quiet, you first have to let it bark. That sounds backwards, but silence only means something once the dog can feel the contrast between the two states.

A dog mid-meltdown can't learn anything, any more than you could learn to swim during a tsunami. Once the alarm system is firing, the thinking brain is offline. So you train quiet in calm, controlled setups: you set off one or two gentle barks on purpose, then capture the silence the moment it appears.