Since trapping wild animals is not only time consuming but also ethically controversial, the use of sniffer dogs to locate the feces of rare species is becoming increasingly prominent, given dogs 'keen sense of smell (over 100 times more sensitive than that of humans) and quick movement. Overseas research indicates that they are 10 times as effective as humans in this area. But there's no such thing as a free lunch.
黃美秀說，由於野生動物的捕捉繫放曠日費時，也有動物倫理的爭議，但因犬隻嗅覺敏銳（是人類的百倍以上）、行動快速，國外研究顯示，以偵測犬找尋稀有動物排遺可達人力找尋的 10 倍效率，所以愈來愈受重視。