THIS is the horror moment a grandma had her head stomped on by a vicious neighbour in a row over dog poo.

Shocking footage shows Linda Scott, 75, arguing with a dog owner when the woman suddenly launches a brutal attack.

The younger woman, dressed in a red hoodie, throws a flurry of punches and kicks at the pensioner which knock her to the ground.

As Scott is helplessly lying on the floor, her attacker continues the frenzied assault by stomping on her head.

The unsettling brawl unfolded right outside Scott’s home in Crown Heights, New York, on Monday, according to ring camera footage.

Scott’s neighbor, a Navy vet who identified himself as Mr Barnett, 37, had just parked his car when he noticed a “commotion” in front of the senior’s home.

“It seemed like a dispute about the dog poop or whatever….a shouting match back and forth,” Barnett told the New York Post.

Adding: “[When] the young lady in the red came around the corner….the way she approached Miss Linda just let me know that she was about to do something to her.”

Barnett recalled Scott’s “agonizing scream” as she lay on the floor.

He said: “She was screaming, like it was an agonizing scream like she was in pain.”

The heroic neighbour managed to pull the dog walker off Scott and escort her from the front lawn.

Scott was taken to One Brooklyn Health-Interfaith Medical Center, where her condition was assessed as stable despite serious bruising to her body and face.

Barnett said he hopes the attacker does “the right thing” and turns herself in.

“[This] could have easily been a conversation,” he said.

Adding: “It’s not looking good for the next generation coming up. Like, that’s not a great example.”

Just before the ruthless attack, one of the women accused Scott of throwing ammonia on her dog, the clip shows.

Scott admitted to pouring ammonia on an empty lot next to her home.

She said the space is often used by dog owners who don’t clean up their pets’ mess, leaving a stench, News 12 reported.

Her son, Matthew Scott, told the outlet his mom never used the cleaning fluid “as a weapon.”

Looking back at the horror ordeal, Scott said: “The young lady had no business beating me like that.

“No business beating me or any other older person like that. Anybody. Period.”

Despite her injuries, Scott said she is thankful to still be here.

“I’m gonna God willing still be here for a while. I got some grandchildren to help take care of,” she said.

The assailant was still on the loose Friday, cops said.