One of the worst things about that house was you rarely, if ever, saw any food in the cages- no browse or anything to occupy them except an odd brief scatter feed. So they just sat and did nothing all day or picked at their hair for something to do/eat. This was a style of management which was passed down from the original house.
Every picture I have seen of Daniel's mother 'Delilah' at Belfast Zoo she is stuffing her face-still making up for lost time....