The three dogs impounded after an attack on a 60-year-old woman have been euthanised (file photo).

Three dogs that mauled a woman at an eastern Bay of Plenty home, leaving her with critical injuries, have been destroyed.

The 60-year-old Opotiki woman suffered deep cuts to her head, neck, abdomen and legs after the canines belonging to her brother attacked her at a family home in the small township of Te Kaha on November 2.

She was flown to Tauranga Hospital in a critical condition. A hospital spokesperson confirmed to Stuff on Wednesday that the woman was discharged from hospital on November 14.

Following the attack the three dogs - a two-year-old Rottweiler cross; a two- to three-year-old Staffordshire bull terrier cross; and a nine-year-old bulldog cross - were seized by the Ōpōtiki District Council.

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None of the dogs were registered.

The dog's owner, understood to be the woman's brother, had been in contact with council and surrendered the dogs, Council's planning and regulatory group manager Gerard McCormack said.

All three have now been euthanised, he said.

"We have issued three infringement notices in relation to the dogs being unregistered."

McCormick said the woman was familiar with the dogs and was letting them out as she normally did when the attack happened.

Police called animal control officers to seize the three hunting dogs from the woman's home. She was then taken to the Te Kaha Medical Centre before being airlifted by the Tauranga-based TECT Trustpower Rescue helicopter.

At the time of the attack, Ōpōtiki Mayor John Forbes described the incident as "serious dog attack by dogs that are well known to her, which is a huge pity".

"It's a small community here and we really feel these things. I have a huge amount of sympathy for the family and those associated with her. We're just doing the best we can in a terrible situation."

The incident was one of three dog attacks in the region that week.

The police were leading the investigation in relation to the attack given the serious nature of the injuries sustained, McCormick said.