Tasman farmer Lloyd Faulkner wants to see greater cat control after toxoplasmosis devastated his lamb flock. Photo: Max Frethey/Waimea Weekly
A Tasman farmer wants tougher rules for cats after toxoplasmosis devastated his flock of sheep, costing him $14,000 in damages.
Lloyd Faulkner has been farming in the Tapawera area for 65 years and had never seen such a "devastating" outbreak of toxoplasmosis before.
"We've always had a bit of toxo, but nothing like this."
Only 37 of his 146 ewes have lambs due to the outbreak.
"We've lost the rest," Faulkner said. "It's a fairly soul-destroying job, day after day going around picking up dead lambs."
The loss was expected to set Faulkner back at least $14,000, a "conservative" estimate, he said.
Toxoplasmosis is an infection caused by a tiny parasite that relies on a cat's digestive tract to complete its lifecycle.
The parasite's eggs are shed in cat faeces, which can then pass on the infection to any warm-blooded animal - including birds, sheep, goats and marine mammals. like the endangered Hector's and Māui dolphins.
Infection of humans can occur through ingesting the parasite's eggs directly from the environment, such as through unwashed vegetables, or from tissue cysts in improperly cooked meat from an animal that has previously been infected.
Faulkner's farm is located next to the Tapawera Wastewater Treatment Pond. He suspected that toxoplasmosis may have spread from flushed contaminated cat litter, spread through his property by the ducks that swim on the pond's surface.
Only 37 of Lloyd Faulkner's 146 ewes have lambs, a loss that is expected to cost him at least $14,000. Photo: Max Frethey/Waimea Weekly
But Faulkner said the infection could also have come from feral cats in the countryside that were common in the area. Tasman is estimated to have at least 28,000 feral cats.
Faulkner said he wanted Tasman District Council to publicise the effects of toxoplasmosis and discourage people from flushing cat litter down the toilet.
He also wanted tougher cat control.
"Get the bloody cats chipped and do something about the number of cats," he said. "It's going to cause a hell of a rumpus, but it's got to be done."
Lloyd Faulkner wonders if that ducks that swim on the wastewater treatment pond next to his property carried the disease onto his property. Photo: Max Frethey/Waimea Weekly
Elected members were told during the council's Environment and Regulatory Committee meeting on 19 October that its cat management bylaw, currently in development, would likely require microchipping but not desexing.
"We want to take the community with us in a safe and agreed away," said environmental information manager Rob Smith.
"The first step in a long path would be microchipping. Once you get to desexing, the cost goes up and you risk alienating a lot more people."
The Tasman District Council, in conjunction with Nelson City Council, was also working towards including feral cats on its joint pest management plan, though feral cat control would be limited to specific, high-value sites.
SPCA scientific officer Christine Sumner said that reducing the number of cats that defecate near food and water supplies for farmed animals may reduce the risk of toxoplasmosis transmission.
"One cat can shed many toxoplasmosis eggs which are hardy and can remain infectious for well over a year after being shed. Therefore, long-term efforts to manage the risk of transmission are needed."
While desexing companion cats can help reduce the number of unplanned litters and therefore limit the potential numbers of stray cats, the SPCA advocates for a comprehensive approach to cat management.
Sumner also said that cat litter should not be flushed and instead should be placed in a bag and put in the rubbish for disposal through landfill.
Tasman District Council did not plan to test for toxoplasmosis in the wastewater treatment pond by Faulkner's property as there was no standard test for the disease in wastewater that could produce a validated result.
Local Democracy Reporting is Public Interest Journalism funded through NZ On Air.
