Elderly Woman Killed By Pet Dog In Her Own Home

Rosemary O’Reilly lived for her animals.

The 72-year-old had many of them, especially dogs, on the Wilton property she lived in with her husband Derek.

She never dreamed one of her favourites would turn to kill her.

Emergency services were called to the home on Hornby Street, in NSW's Macarthur region, southwest of Sydney, at about 1.30pm on Thursday where they found Rosemary with severe lacerations and bites to her arms, legs and body.

“She had multiple limb injuries, facial injuries, injuries to her chest quite significant injuries and bite marks” NSW Ambulance Inspector Gavin Wood said.

“The injuries that she had and her age were working against her”

Rosemary O'Reilly was at home with her husband when she was attacked. Photo: Supplied

Tragically Rosemary passed away while undergoing surgery in Liverpool hospital on Thursday night.

Her husband of 50 years, 74-year-old Derek was also savaged. It's understood the dog may have been agitated by the couple having a minor argument just before the attack.

“He was quite distressed, his wife had been brutally attacked by this animal he himself had significant injuries to his arms and legs,” Wood said.

Derek told 10 News First that the dog attacked him first and that Rosemary tried to step in before the dog turned on her, inflicting the fatal injuries.

10 News First has been told the dog they called “Athena” was a female American Pit Bull.

Derek said she had never been aggressive towards people before but had attacked and killed one of their other five dogs in recent weeks.

READ MORE: Dog Stabbed In Shocking Act And 'Left To Die'

Authorities have impounded the offending dog pending a full investigation, it is expected it will be put down in the coming days.

Wollondilly Shire Council Acting Chief Executive Michael Malone told 10 News First this attack is traumatic for all involved and issued a warning to dog owners.

“We would always encourage people to be aware that dogs are animals and you have to be aware that they can have a change in temperament for some other stimulation and treat them as dogs not as cuddly toys.”

The council will go through the correct procedures under the Companion Animals Act before making a final decision on the dogs fate.