Brian Cleghorn’s pet whippet Daisy was left needing nearly £9,000 of emergency veterinary treatment after the unleashed dog pounced in Clissold Park, but died a day later.
The 66-year-old was walking his three dogs near the pond when the large grey-blue mastiff ran towards them and took Daisy, eight, into its jaws – shaking her, ripping her stomach open and only dropping her when its owner approached.
Police are now appealing for information to trace the mastiff’s owner, who left the park with her dog covered in blood after the attack on Wednesday, May 28.
Devastated Mr Cleghorn said it was a horrible shock: “The teeth marks went right through to her lungs. Her ribs were broken. It’s like having a polar bear on your back. It was a big breed of dog – you will never get those dogs off once they lock on.