Six more Victorian species are now fighting for their lives but experts say they could be saved if we stop letting our cats outside and start using recycled toilet paper.

Zoos Victoria announced on Thursday morning that 27 native species now need urgent intervention, up from 21 just five years ago.

But they want people to remain optimistic. These animals can be saved if people make a few simple changes to their behaviour

“The biggest thing people can do, if they are serious about this,” Zoos Victoria chief executive Dr Jenny Gray said, “is keep their cats indoors at night.”

A roaming pet cat kills about 70 animals a year, Zoos Victoria says.