Apparently, in the 1950s Mouflon were kept there. The Barbary sheep moved into 'a modestly budgeted exhibit' in July 2005 after plans to develop the quarry as a Rainforest Dome were shelved (I seem to remember one of the reasons was local residents objecting). I think there were 0.4 sheep left when 1.3 Tur arrived in August 2013. In 2016 1.2 Tur kids were born. By the time they were all PTS in March last year there was just one sheep left.
The Takin Bros, Adrian and Arnold, were born in Finland in 2008 and arrived at PZ in October 2010.