Bill Cody and I are finishing up a series of articles that will touch on this subject. I hate to give all the juicy details away on here. The first article should be out in the Nov-Dec or Jan-Feb issue... I believe the second article will talk about methods you can use to reduce the risk when transferring wild fish to your pond. It is more aimed at forage fish, but the methods mentioned will certainly be pertinent for game fish as well.