The attack left the toddler with nasty bites around the upper arm.
The dog did not appear to be tagged in photos provided by the visiting family affected and was subsequently put down by police last week.
Police media liaison officer, Trevor Pitt, says any attack by a dog on any person in any location is subject to prosecution, and the death of the animal.
He says the Dog Control Unit of the Police Service has put down 160 dogs over the past 11 months of the current island-wide campaign. In Puaikura, 63 dogs were terminated, and in Te Au O Tonga, a further 97.
The Takitumu district sweep has now begun with the Police Officer in charge of the unit undertaking house-to-house visits starting from Matavera. All dog owners are reminded to be responsible and comply with the law so that unfortunate incidents can be avoided, says Pitt.
On Monday, a spokesman for Rarotonga’s three animal health and welfare organisations said the results of the SPCA’s recent dog population survey on Rarotonga, and an assessment of the number of dogs on the island still capable of breeding, was almost complete.
The survey results will be used to guide an island-wide dog de-sexing campaign to be funded by the SPCA.