A four-month-old puppy has spent days in intensive care with a broken rib and collapsed lung after it was mauled by another dog in a viscious attack.

Cricklewood dog owner Mehdi says he was in “complete shock” as he desperately tried to fight off two massive XL bully dogs who had set upon his four-month-old border collie, Max.

Max, who regularly is taken for walks in Hampstead Heath and Gladstone Park, is described as a “friendly” dog who loves to approach and play with other pups during his leisure time.

But Mehdi, who did not want to give his surname, was in disbelief when the two dogs ganged up on Max in Gladstone Park on Monday, April 17 at 6.30pm.

Ham & High: A screengrab of a video during the incident in Gladstone ParkA screengrab of a video during the incident in Gladstone Park (Image: Handout)

Mehdi recalls how he tried to take Max away after the other dog owner frantically shouted “danger, danger”.

But “in a matter of seconds”, he said the two XL bullies bit and mauled Max.

He said: “And then he [the other owner] lost control of one of the dogs, the leash was on the ground and he fell over.

“He couldn’t restrain his own dog and it was biting Max on the chest and the groin area.”

Ham & High: Max the dog, pictured pre-injuryMax the dog, pictured pre-injury (Image: Handout)

Panicked after seeing blood, Mehdi and a stranger passing by tried to pull the attacking dog away and was forced to kick it in hope the dog would budge.

But it was not until the other owner bit the dog on its ear that the attack stopped.

“He was completely covered in blood and my T-shirt was drenched in blood. He was crying and he couldn’t breathe properly,” said Medhi.

In a video capturing the incident, the bully owner was heard yelling: “It’s your f***ing  fault.”

Ham & High: Max still has severe injuries, but is slowly recovering after three days of intensive careMax still has severe injuries, but is slowly recovering after three days of intensive care (Image: GoFundMe)

However Max’s distraught owner says that if the owner was aware before the incident that his dogs would be a danger, why were they not wearing muzzles.

He stated there’s a “loophole in the law” regarding banned breeds, citing other media reported incidents of children and other dogs attacked by the same type of dog.

Ham & High: Max the dog, pictured pre-injuryMax the dog, pictured pre-injury (Image: Handout)

Max is now slowly recovering from his internal bleeding, but is still reportedly at risk of dying from sepsis.

Mehdi says he still has to pay £6,500 towards bills at a Belsize Park vet and a GoFundMe page has been set up after the tragic incident. To donate, visit: https://gofund.me/d77f9a0b