Wellingtonians wanting to own more than three cats may have to ask the city council for permission first.

The council's environment committee will be presented with a proposed animal bylaw, capping the number of cats a person can own without council consent. People wanting to have more than three need council permission first.

In 2013, Gareth Morgan launched a campaign to eradicate domestic cats, calling them natural-born killers that destroy native wildlife. He claimed a recent study of cat behaviour in Auckland revealed the number of times cats trespassed on other people's properties was 300 million a year.

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