Two severely malnourished mongrels rescued from a To Kwa Wan flat are believed to have eaten the remains of two other dogs to survive. The dogs were found by firefighters on Sunday night after neighbours in the Mei King Mansion reported a foul odour coming from a flat on the 13th floor. Police are looking for the occupants, who have not been seen by neighbours for at least a fortnight. The two surviving dogs were collected by the Society for the Prevention of Cruelty to Animals (SPCA), who believe they went several days without food. They were found wandering free about the flat while the dead dogs were found in the kitchen and living room. 'It is possible the other two dogs had to eat them to survive,' an SPCA spokeswoman said. All four dogs were mongrels and fully grown. Aside from malnourishment, the surviving dogs had no obvious sign of injury, although the SPCA acknowledged that its veterinarians had not been able to give the traumatised animals a proper check-up. 'They have no fat and their bones can be easily seen,' an SPCA spokeswoman said. 'They are so nervous that they are not fit for a thorough examination.' Neighbours called the police at about 10pm on Sunday. Firefighters forced their way into the flat after no one answered the door. The SPCA spokeswoman said none of the four dogs had identification microchips and police were looking for the owners. Officers put up a notice on the flat's door asking them to contact Kowloon City police. Police are treating the incident as a cruelty-to-animals case and crime squad officers are investigating. Last night, the two surviving dogs were being kept at the SPCA headquarters in Wan Chai.