If you read back through some of the earlier posts on this topic, there are a few rescources mentioned. My favorite book is called 'The Pack Goat' by John Myonsinski. There is also a yahoo packgoat group;
packgoat@yahoogroups.com that you can check out. There is a packgoat forum that you can google as well, and there is an association;
North American Packgoat Association is a national organization set up to promote and educate about using goats as pack animals, and they have access to lots of information on their site as well. But dont get too overwhelmed by the vast amount of info out there, like I have mentioned in previous posts, the main advantage of packgoats is their simplicity. I would never feel comfortable sending a person out with several pack mules or horses if they have never been around horses before, but I can give a quick 30 minute orientation to a newbie to packgoats and send them on their way, and they wouldnt have any problems. Just make sure you pic the right goats, and get them on the trail as often as possible, and thats really the bottom line.