Mid-Levels dog owners are being asked to sign up for a neighbourhood watch patrol to try to catch a serial poisoner who has eluded police since 1989. The Society for the Prevention of Cruelty to Animals (SPCA) launched its e-mail campaign for volunteers on Tuesday but so far no one had replied, said executive director Chris Hanselman yesterday. 'That's very disappointing. Let's see what happens tomorrow,' he said. Those interested in organising neighbourhood watch units, or who have other suggestions on the problem, can e-mail email@example.com . 'We are asking people for support, to try to get a public group together with a view to taking action against the poisoner,' said Mr Hanselman. 'We really need to catch this guy . . . and somehow put him away. He's obviously a very clever guy and has a real hatred for animals.' In the latest series of attacks this month, four dogs have died and at least five were taken ill after eating insecticide-laced chicken in the Bowen Road and Black's Link area. The poisonings date back to 1989 and are suspected to be the work of one person. Police first launched an investigation in 1991. Dr Saul Chemonges, a vet at the Hong Kong Veterinary Centre branch in Sai Kung, said yesterday he had seen isolated cases of dog poisoning in the area but nothing like the series of attacks in Mid-Levels. He agreed that catching the suspect should be a community effort. Pet owners should also be educated about muzzling their dogs and should not let them run around, he said. The vet also said the police should have 'enough resources' to be able to do more surveillance.