My dogs behaviour had suddenly changed after staying at a friend’s whilst I was in hospital. My usual chilled, happy dog seemed hyper alert and was running to the front and rear door whining, refusing to go toilet in the garden and when resting he was shaking. I sprayed this product on his beds and within a day he was back to himself again. Such a relief!! People mention the smell of the product in the reviews. After an hour the smell disappears so please don’t let this put you off.