There are three approved organizations in NZ that can act on animal welfare complaints: the police, the Ministry for Primary Industries (MPI) and the Royal NZ Society for the Prevention of Cruelty to Animals (RNZSPCA).
Police
Senior Sergeant Pete Pedersen from the NZ Police says that although minor animal welfare concerns are generally referred to local council - mainly things to do with Animal Control - or the SPCA, those more serious cases of aggravated cruelty are immediately acted on by police. Unlike other organizations, the police have the power to arrest as well as bring a prosecution.
MPI
MPI have verification staff, who focus on production farm inspections. Food safety requirements, hygiene and production standards are monitored, and as these individuals are also warranted animal welfare inspectors they look for any welfare breaches. Most recent information shows around six hundred complaints per year being investigated, some resulting in prosecutions.
The welfare requirements surrounding live animal exports are also a responsibility of MPI inspectors who issue certificates of compliance and follow up complaints.
SPCA
Investigating complaints and enforcing the Animal Welfare Act as it relates to companion animals is predominantly the responsibility of the RNZSPCA and its forty seven member SPCA's throughout the country. Each year around fourteen thousand animal welfare complaints are investigated.