I am trying bale grazing for the first time, things are going well but I am having a hard time keeping the cows where I want them! I am using a hot wire but it doesn't seem to have much punch. I have a 6' ground rod pounded in. most things I am reading say to check the ground first. Has anyone ever tried the Gallagher fence checker. They are expensive but if they work it might be worth it. Any advice on electric fencing in the winter would be appreciated.