Horrified dog owners have watched on as their tiny pug was mauled by another dog before being crushed by a truck.

The 12-month-old pug Lola was being taken for a walk on Sunday night in Carlisle, in Perth's inner-east, when a white dog jumped out of a ute stopped at the lights.

Lola's owners claim the dog - described as either a pit bull or Staffordshire Bull Terrier - launched a savage attack on the helpless pug before being whisked away by its owner.

Horrified dog owners have watched on as their tiny pug Lola (pictured) was mauled by another dog before being crushed by a truck on Sunday night

The 12-month-old pug was being taken for a walk on Sunday night in Carlisle, in Perth's inner-east

'The dog latched on to Lola's neck and was lifting her up and ripping her apart,' Lola's owner Ellie McKay told 9 News.

Ms McKay and her fiancee Simon Warman pulled the larger dog away from Lola who was badly injured.

But in her distressed state, Lola ran away from her owners and directly into the path of an oncoming truck.

Seeing Lola being obliterated by the truck was described by Ms McKay as the 'worst experience' of her life.

She added: 'I don't think we will ever get over watching her die.'

Seeing Lola (pictured) being obliterated by the truck was described by owner Ellie McKay as the 'worst experience' of her life

CCTV from a nearby liquor store shows the driver of the white ute chasing after his dog after the attack.

Ms McKay said the man gathered his dog and left the pair there screaming in despair.

'He just shrugged and said "sorry about that" and put the dog back in his car,' she claimed.

The couple are pleading for the public's help to find the owner who is described as fair skinned, in his late 50s with grey hair and stubble, according to 9 News.