This is not specific to chameleons....but gives lots of good information...
http://veterinarycalendar.dvm360.com/acute-and-chronic-renal-disease-reptiles-proceedings
https://www.vetstream.com/treat/exotis/reptile/diseases/renal-disease
http://veterinarycalendar.dvm360.com/acute-and-chronic-renal-disease-reptiles-proceedings
https://www.vetstream.com/treat/exotis/reptile/diseases/renal-disease