I carry my K9 in a DeSantis N67 Nypad paddle holster. It's comfortable and conceals very well under loose shirts or vests/jackets.
http://www.desantisholster.com/
I have recently starting carrying my Commander in a Safariland 560. It is the most comfortable paddle holster I have ever worn! It, too, conceals quite well.
http://www.safariland.com/cfit.htm
[This message has been edited by DMSC (edited February 10, 2000).]