A three cats per premises limit will come into force in Whanganui on July 1 next year.
Households will only be allowed three cats under a Whanganui District Council amendment of the Keeping of Animals, Poultry and Bees Bylaw 2020 this week. Animals will have to be desexed and, before they are 4 months old, microchipped.
Cats kept for breeding purposes are exempt.
Council compliance operations manager Warrick Zander said most cat owners have three or fewer cats anyway.
"We expect reductions in cat numbers will happen gradually over time and we'll use a graduated response to compliance, starting with education." Responsible owners who have more than three cats that aren't causing a nuisance can apply for an exemption, he said.