I had five males together but one was chased away, probably due to
territory disputes. See--
http://www.geocities.com:80/Heartland/Estates/4185/digthree/journalpage9.htm
If I recall correctly, Julian has many males together in a large tank
and they are fine. Perhaps, giving them a deep layer of litter and
keeping the cage simple will avoid territory disputes. Complicated cage
set-ups with many levels and hiding places increase the chances of
territory disputes.
Julian how many males do you have together and what size is their
enclosure? Also, do you have a picture of this set-up?
--
Gary's web pages -
http://home.talkcity.com/StudioDr/go5