Gareth Morgan's campaign to control cats and save native birds could increase animal abuse and the economist should be held accountable, says the SPCA's executive president.
Bob Kerridge has written in an opinion column in today's Herald that Dr Morgan is trying to deprive people of their "beautiful relationship" with cats.
Last week, Dr Morgan launched a campaign, Cats To Go, urging people to consider the damage cats were doing to native birds.
He said 1.4 million cats were killing native birds in cities faster than they could breed.