Going to tell you a funny story. Some guys came over from Germany on a you for me trip. I went boar shooting ,they to see someone catching rabbits. We went onto one of my perms and did all the usual with nets, locators, silence etc etc.. anyway, using my locator box, I asked for total quiet, ‘these guys were camera clicking like crazy’, I indicated that my ferret was very close to the surface and was probably on a rabbit. Without too much ado I plunged my hand into the earth and as luck would have I had the rabbit. All caught on camera. Those guys bought me a few beers. All without a probe. J