shows how much ferreting you done in your 15 years because rabbits do bolt better when its frosty but if it a really cold day and a very hard forst its hard to get them rabbits to bolt and i no my ferrets and if they dont show after about 20 or 30 minutes its time to get the mark 3 witch is well easy to use i cant understand why people have problems with them because a got the mark 1 and the mark 3 and i find the mark 3 better and faster to find the ferret
and yes i have dug some very big holes for you to fall in to and i will fill it in after