We lease over 50 lakes, many with Gizzard shad. The lakes that consistently, produce the largest bass have gizzard shad in them. I have not seen a lake that has been ruined by them, although I believe the horror stories. The key is to make sure that your bass population has a stable population of large bass. A lake with lots of 1 to 2 lb bass and the rare 8 lb is not a good candidate.
