: Their hearing is up to four times more sensitive than a human's, allowing them to detect high-pitched sounds and soft noises from a great distance [23, 25].
Beyond their biological traits, dogs themselves provide several "useful features" to human life: : Their hearing is up to four times
: Much like a human fingerprint, every dog's nose print is unique . This feature is so distinct that some countries, like Finland , have used nose prints for identification instead of microchips [10, 31]. 25]. Beyond their biological traits