Kaipara District Council has taken in a dog that may be responsible for up to two attacks on stock near Dargaville.
A large mastiff-type dog was discovered early on Thursday after it had killed two sheep and mauled three others belonging to Dargaville farmer Vern Suckling.
Mr Suckling and his wife were woken about 5am by a loud crash outside their home on Colville Rd, on the northern outskirts of Dargaville.
When he got outside he realised the dog had knocked over a large plant pot as it was mauling a sheep that had managed to escape the devastation in the paddock.
''It had bailed the sheep up against the house and was having a go at her when it must have knocked the plant pot over. The sheep had managed to escape from the paddock and [the dog] must have followed her to have another go,'' Mr Suckling said.