They came from an urban zoo (Hanover) situation so fairly safe but its still in a foriegn country, so its a bit surprising to see 'quarantine' is being treated as a technicality if it means immediate contact with other monkeys.
I know they've been out of quarantine a long while now but I hope these cages are large enough for an invasion of female Drills to join these males (well, two or three is probably the very most we can expect realistically-speaking ) I'm looking to Woburn to do something for Drills generally.