I would consider taking him away and see whether it breaks the habit. Our Springer is terrified of fireworks and it takes a few days to get back to his old self. Since the last lot of fireworks he's taken to living in the dining room ( I belive this is either due to TV noises or that it's become to hot for him following the firing up of the wood-burner), but his behaviour has changed since the summer. He rarely barks when we arrive home (which he always has done) but will bark at passers by. Very strange/
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