The chain is as attention sign good use. Neither case should therefore be taken of the dog! You can use it on your dog's attention, for example, a wildlife interrupt, so that the dog again the cries of Herrchens perceives. This is quite reliable when the chain in Near the dog strikes on the ground. The dog is of his "fixed" object (such as strange dog) distracted and hears normally at this moment the command the Herrchens. If you know how it is to be used, a clear recommendation.
