I just bought the small leather prong collar from GDS for my Brittany and am unsure of how tight it should be for training. The collar is leather, with 1/4 long blunt metal studs on the inside. I got the smallest size, which should be good for him since he is only about 40 lbs. But I wasn't sure if I should have it snug on his neck, then tighten for correction, vs having it on the loosest setting and then tightening from there for correction with a gentle tug on the leash? On the loosest setting, it gives him more slack and is probably more comfortable. I'm just wondering if its tighter, will he be able to associate "turning the pressure off" as much? It seems like going from loose to tight in correction demonstrates the point better, but it is really loose on his neck doing it that way. Does anyone have experience with these collars and the appropriate fit for training purposes?