A MIDVALE couple say their nine-year-old granddaughter has been left traumatised after watching their dog get ripped apart by a bullmastiff in Perth’s eastern suburbs this weekend.

Owners Rosemary and John Lotstra forked out $14,000 in a last ditch bid to save their pet Maltese-shitsu Sam, but his injuries were too severe. He died on Monday.

The couple are now calling for rangers to put the bullmastiff down after it was seized by rangers.

“We fought for him for thirteen years and this dog can take him away in seconds,” Mrs Lotstra told 7 News Perth.

“He took my baby, he took my whole world, I don't have a world anymore.

“My dog can't come back. My dog is gone.”

On Saturday the Maltese-shitsu cross was mauled as Mr Lotstra took Sam for a walk in Mundaring with his nine-year-old granddaughter.

He said the bullmastiff cross charged at his pet in an alleyway.

The owner of the bullmastiff, Jessie, lives next door to the alleyway and claims that the dog is all he has to remember his late brother by.

Jessie’s owner died two weeks ago, with his brother Barry taking her on.

Barry claims that the dog didn’t intend to do harm.

“The dog was just confused... it's not a bad dog,” he said

Jessie has been seized and is at the Mundaring Pound but the Shire is yet to make a decision on her fate.