In my opinion (I will probably get flamed for this) Brian's care for lizards is off, he has recently started lizards and while im sure his INTENTIONS are good his husbandry isn't there, to be honest he just got into blueys and I'm almost afraid to see his housing for them. I don't agree with lizards being in racks like he has his dragons. Here are two extremes, I am not saying a beardie needs an enclosure this big, (but how awesome would it be) But compare how this breeder houses his dragons to Brian's: http://atomiclizardranch.net/bearded-dragon-breeders/ If you are interested here is some reading, one of the links is about Monitors, however he does a good job of explaining gout and the though process behind why the correct substrate is essential. If my "ranting" even can change one person's outlook than I am happy.
http://www.merckmanuals.com/vet/exot..._reptiles.html
http://www.anapsid.org/kidney.html
http://www.anapsid.org/diverskidney.html
http://www.varanustalk.com/forum/iframer4.php?page=gout