THE pit bull cross which "saved" a boy whose mother allegedly tried to drown him in the Murray River has been spared.

NSW Police has advised the Murray River Council that the animal was responding to "extreme circumstances" and likely acting in a "reasonable defence" of the boy, who remains in hospital in Melbourne.

7 The pit bull named Buddy has been credited with helping to rescue at least one of the lads Credit: Twitter

7 The two boys were led to the river by their mum who police say forced her sons underwater Credit: Facebook

Earlier, a petition had been started to protect the dog, named Buddy, following the drowning tragedy that left the nine-year-old in hospital and his brother, 5, dead.

The two young boys were allegedly led to the river in the border town of Moama on Thursday afternoon by their mother who police say forced her sons underwater attempting to drown them both. She's since been charged with murder and attempted murder.

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The nine-year-old managed to struggle free and ran up the riverbank, but according to police was "savagely mauled" by a dog as he tried to escape.

The dog also attacked the mother as she tried to drown her youngest son, an investigating detective claimed in court.

The dog was seized by the local council following a police order.

7 The nine-year-old managed to struggle free and ran up the riverbank Credit: News Corp Australia

7 The dog also tried to attack the mother as she drowned her youngest son, police say Credit: News Corp Australia

But Buddy’s owners say he was trying to protect the children, rather than attack them, and believe he should be returned and protected rather than punished.

The Gopetition page, started by the dog’s owners and supported by the boys’ grandfather, says: "Buddy the dog has reacted and attempted to save the boys in doing so he has bit the eldest boy in his rescue attempts. Unfortunately he was unable to save the youngest boy and has also bit the mother."

The owners say Buddy "doesn’t have a history of being a dangerous dog" and has never previously been seized or bitten anyone.

7 Buddy's owners said he was trying to protect the children during the alleged attack Credit: Facebook

7 A Gopetition page was created to save the dog's life and received 50,000 signatures Credit: News Corp Australia

7 The boys' mum has since been charged with murder and attempted murder Credit: News Corp Australia

"Buddy is a member of our family and has grown up around children his whole life and has been the most gentlest dog," they wrote.

"He has clearly seen a child in distress and attempted to help."

The petition, which has garnered more than 36,000 signatures, is addressed to the Murray Shire Council who Buddy's owners want to release the dog and "let him come home".

The petition has been backed by the maternal grandfather of the boys, who says he wants to "do everything we can to help save Buddy".

"I own a similar dog, and I know he was trying to save the boys, it’s their nature when they are raised with kids," he said. "Let the ones who his actions affected decide. I have one grandson left, because this brave dog took action as required."

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