A huge dog has viciously attacked a smaller pooch in a horrifying park brawl.
The shocking incident saw what looks like a loose German Shepherd lock its jaw onto a much smaller white dog.
Two women were left screaming after the bigger mutt launched its attack.
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Footage shows the hound picking the smaller pooch up and shaking it around in its mouth, as reported by Need To Know.
Two men came over to help by spraying the dog with water.
Suddenly a man in a black coat, who is suspected to be the owner of the vicious mutt, jumped in to pull it away.
But the group was unable to separate the dogs until another man in a grey tracksuit took the brave decision to put his finger in the animal’s bum.
The trick is recommended when dogs are being aggressive as it will cause them to drop whatever is in their mouth.
The bigger mutt eventually dropped the smaller dog.
The shocking incident took place Sunday (13 Apr) in Roe Green Park, London.

Members of the public were left stunned.
George Attasda said: “Shake that man’s hand.”
Another said: “Owner should never be allowed to own an animal until they complete training too.”

One other added: “I hope that poor dog is ok.
“It makes me so mad that these useless dog owners have no control over their pets.”
One said: “I mean, respect to the guy in the grey tracksuit for saving the dog, but the amount of banter that’s going to be thrown his way from now on.”
Another said: “In fairness I think the trackie saved the day.

“The finger trick actually works, hilarious.”
Jam Press has approached the Met Police for a comment.
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