there really is no clear cut answer,some tricks work on some dogs and some dont,you usually have to try several things to find out wwhat the individual dog will respond to.the best thing i found is to break a young pup before he ever gets it in his or her mind to start.it is easier to teach them what not to do than it is to break a bad habit. iwould put the pup on a deer,and always make sure it is a deer first,then when the dog goes after it,use the shock collar. a young pup will usually learn much faster than a older dog that has already started to enjoy running trash.best of luck