The council is also investigating four reports of a rottweiler acting aggressively towards people on the street.
And a woman is facing fines after she exercised her two dogs, one which was classified as being "menacing", without restraint or muzzle.
Mr Smedts said the attacks were disappointing.
"Thousands of additional dogs arrived with visitors and absentee homeowners over the peak holiday period," he said.
But no attacks were reported at beaches or public places.
He said the attacks were all avoidable if owners kept their dogs under control.
"The attacks are a reminder to dog owners to control their dogs at all times or face penalties under the Dog Control Act.
"If dog owners see aggressive behaviour in their dogs they should make sure they correct that behaviour before more serious incidents occur."