DAP is very useful. It works for some dogs, others it doesn't. It's hit and miss. The diffuser is a good idea I think. And the spray. The collars are not so much though. I just spray a bandana and put it round my dog's neck, much cheaper and spray lasts ages. The collar only lasts 4 weeks once opened but the spray you can use anytime you need it without it 'going stale'. Although collars would be good for around bonfire night just once a year!

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