Environmentalist Gareth Morgan has offered to donate $5 to the SPCA for every homeless cat they put down.
Morgan and SPCA executive president Bob Kerridge have been locked in a war of words after the businessman launched the "Cats to Go" campaign last week, labelling cats as "natural-born killers" and calling for local governments to require registration and micro-chipping of cats, and to eradicate unregistered cats.
In a New Zealand Herald opinion piece, Kerridge called for Morgan to "rethink your tactics and join us to bring about a positive solution by encouraging responsible cat ownership".
"Why not put your money where your busy mouth is and support us by assisting with the funding of desexing and micro-chipping of every domestic cat in the country. That will make a positive difference, and will free up SPCA funding to add to our bird rescue activities," Kerridge wrote.
"If you don't want to do that, and you continue on your ridiculous resolve to be rid of all cats, I can only repeat what I have already said: 'Butt out of our lives, and don't deprive us of the beautiful relationship that a cat can provide, individually, and in our families'."