As part of the national disaster warning system, there are over 4,000 sirens placed around the Netherlands. These are tested at 12:00 on the first Monday of every month for a couple of minutes.
Our younger dog, Watson, reacts to the sound of these sirens by howling in sympathy. Perhaps it’s some deep-seated instinct that he’s inherited from his wolf ancestors? Whatever the reason, he always reacts this way on the first Monday of every month.
I see from Youtube that many other dogs react this way, so perhaps there is some instinctive reaction at work here.