The first step in gaining the upper hand over a mice infestation problem is to try to locate their entry point into your home or business. From there, its time to provide a solution to prevent their entry, like wire mesh or even filling small holes. From that point, The Shield Pest Solutions uses three common methods to eliminate mice. The first method is using bait, the second is using a trap, the third involves the use of tracking powder or dust the mice walk thru and ingest. Of the three methods, using a trap is the most preferred but depends entirely on the individual situation.