i went out on my first trip yesterday with both my ferrets and a mk3 locator, after about 10 mins he had stopped coming out of the holes, so out come the ferret finder , we located him 3 ft down and started to dig to find him backed up on 2 bunnys , if we never had the locator he'd prob stil be down there with enough food to last him 2 weeks , i know there expensive but there worth there weight in gold mate . atb