'That dog killed my best friend': Young girl's dog fatally mauled at park

A 10-year-old Perth girl is traumatised after her Jack Russell was attacked by a dog in a park and left with injuries so severe the family pet was put down.

The owner of the dog responsible for the attack left the scene without giving her details.

Now the Stein family is urging her to come forward with an apology.

Putting on a brave face, 10-year-old Hollie Stein is missing her best mate.

Charlie the Jack Russell was mauled in the park. Source: 7 News
Charlie the Jack Russell was mauled in the park. Source: 7 News

Charlie the Jack Russel was taken to the vet on Friday but never came home.

"That dog killed my best friend," the grieving girl told 7 News.

Hollie was walking Charlie at Kingsbridge Park about 5.30pm Thursday when a larger black dog attacked.

Hollie Stein (right) was walking her dog when a bigger black dog attacked. Source: 7 News
Hollie Stein (right) was walking her dog when a bigger black dog attacked. Source: 7 News

"He ran out of nowhere and started biting Charlie and picking him up and everything."

Hollie said the dog's owner, a woman, was sitting nearby and she had to scream to get her attention.

"She said 'I'll pay for the vet bills give me your mum's number.'

Charlie died from the injuries. Source: 7 News
Charlie died from the injuries. Source: 7 News

"And I was worried about Charlie and I kept saying just follow me home it's right across the road and she was like 'no give me your address' so I gave her our address.

But to Hollie's disappointment the woman never showed and Charlie's condition deteriorated overnight.

A visit to the vet the next morning revealed he had a ruptured kidney and severed pancreas.

Hollie and her family want the woman to come forward. Source: 7 News
Hollie and her family want the woman to come forward. Source: 7 News

Hollie's mother Nat Stein said they wanted the woman to come forward and apologise.

"We're not after money we just want you to come say sorry to Hollie just to give her some closure on what's happened and so I can show Hollie what the right thing is to do," she said.

Hollie said she had to say goodbye to her best friend. Source: 7 News
Hollie said she had to say goodbye to her best friend. Source: 7 News

Hollie said the dog's owner, described her as being Caucasian, was wearing a white singlet with a skull printed on it.

The Stein family says the City of Waneroo ranger is investigating, checking nearby CCTV for clues.

Anyone with information is encouraged to call Crime Stoppers 1800 333 000 or use the Crime Stoppers online reporting page.