Two Rottweiler dogs attacked autistic man Oliver Beaumont when he was walking down a gravel road in Winton on Sunday.

The two dogs that viciously attacked an autistic man in Southland have been euthanised by a vet.

Autistic man Oliver Beaumont, 22, was attacked by two Rottweiler dogs during a walk on Sunday afternoon.

The attack took place on a gravel road that ran parallel to Great North Rd in Winton near Beaumont's home.

The Southland District Council issued a statement on Friday saying the dogs had been euthanised.

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"The owners of the dogs voluntarily surrendered them and have been co-operative in the process."

Southland District Council group manager environmental services Bruce Halligan said information was still being gathered on the attack.

"Council is still to make a decision on whether further action will be taken under the Dog Control Act, and no decision will be made until statements from everyone involved have been received."

Beaumont suffered more than 60 puncture wounds to his body, predominately to his face and head.

One bite was so deep it was down to his skull and required extensive surgery.

Police received three calls about the attack and dispatched officers at 1.21pm, the first arrived at the scene nine minutes later.

Neither owner was present at the time of the attack, or immediately after.

Police notified one owner who was at work, and they contacted the other owner at work who did not arrive until around two hours later.

Beaumont was discharged from Hospital on Monday and was recovering at home.

Southland District Council environmental services general manager Bruce Halligan said the two dogs involved were impounded at the council facility following attack.

Halligan did not know whether there had been previous complaints about the animals but said the animal control team would look into any past complaints about the dogs, as part of their investigation.

Under the Dog Control Act, the owners of dogs that attack can face a fine of up to $3000 plus any liability that they incur for any damage caused in the attack.

The court must also order that the dogs be destroyed unless there were exceptional circumstances.