In June 2004, Hamilton Zoo completed construction on a 3,000 square metre exhibit for chimpanzees. The exhibit features two large fields, divided by an overhead swing bridge, a forest area, a water feature and a large multi-storey night house, with public viewing windows. In July, six chimpanzee, Susie, Sally, Mike, Lucy, Lucifer and Luka, arrived from Auckland Zoo. In December 2008, mother and daughter, Fimi and Sanda, arrived from Adelaide Zoo. The intention was for them to breed with teenage brothers, Lucifer and Luka, or their father, Mike. Susie died of cancer in November 2010, and in March 2011, Mike died after an operation to amputate his arm. The top of Mike's finger had been bitten off, following an altercation with Luca, and while antibiotics were prescribed, the infection quickly spread to his arm. Fimi was put down in April 2012, following advanced heart failure, causing major changes to the chimpanzee community. Ongoing conflicts between Fimi and Luka, the dominant male, had led to the keepers having to separate the chimpanzee into two groups, with Luka and Lucifer in one group, and Fimi, Sally, Lucy and Sanda in the other. Fimi's death allowed the reintroduction of the two groups, with Sally taking on a role of surrogate mother to Fimi's daughter, Sanda. The zoo is hoping Sanda will breed with Luka or Lucifer in the near future.