Ms Shields has a cat called Otto Blotto - "because he's so lazy".
"He's an indoor cat and I'd like to encourage that, as well."
Conservation organisation Forest & Bird has issued a nationwide information sheet promoting responsible cat ownership, such as "sterilising your cat; keeping the cat inside as much as possible; attaching a bell to its collar and seriously considering whether to replace your cat before it dies".
Chairman of the Far North branch of Forest and Bird Dean Baigent-Mercer said a lot of what Mr Morgan had pointed out was true.
"Last winter I would hear kiwi at night and then at the same time the next night I would just hear cats. There are wild cats all over Northland ... killing native birds, native lizards, native bats and native insects," he said. "And these are domestic and wild cats doing the killing."
Mr Baigent-Mercer pointed out that Mr Morgan said some species had been made extinct.
"Well, in Northland we've lost our native thrush, the piopio and native quails. They went early on when cats were first introduced."