"A post-mortem examination carried out (yesterday) confirmed Chloe suffered horrific injuries inflicted by the dogs," Cramer said.
Police ruled out their initial suspicions of homicide yesterday. Cramer said the dogs were removed by Animal Control and destroyed.
A source said the same dogs had previously attacked a neighbour's cattle, inflicting "nasty injuries" on the stock.
He said the police inquiry would focus on the culpability of owning dangerous dogs.
"It is hard to believe the harm that dogs cause to innocent people yet the dog lobby put huge pressure on the Government to water down our dog control laws," he said.
Mathewson's former boss at In Shape Studios, Helen Chisholm, said she was a "super" pilates instructor who would be missed.
"It is absolutely horrific and our thoughts are with her family and friends," Chisholm said.
Police said it was too early to confirm whether charges would be laid or not.
Dog deaths
• 1997: Koro Maruki Dinsdale, 59, of Te Puke, killed by two bull terrier-cross dogs.
• 2003: Dog breeder Yvonne Harris, 73, of Northland, died after being bitten on the foot by a pure-bred Alaskan malamute.
• 2004: Carol Leanne Taylor, 39, of Dunedin, killed by her pet bull mastiff.
• 2007: Virginia Ohlson, 56, of Murupara, killed by two dogs; a pit bull terrier and a Staffordshire cross.
