I found a few threads when I did a search. Not much information on Derek's animals, but three different threads in which people had fairly major problems with his communication.
http://www.faunaclassifieds.com/foru...=Derek+Roberts
http://www.faunaclassifieds.com/foru...=Derek+Roberts
http://www.faunaclassifieds.com/foru...=Derek+Roberts