Acting Senior Sergeant Dylan Robinson, of Kaikohe police, said a 20-year-old Auckland man had been arrested and held in custody overnight.
Police opposed bail when he appeared in the Kaikohe District Court on Tuesday charged with cruelty/ill-treatment of an animal, common assault, threatening behaviour and wilful damage.
In some cases animal cruelty prosecutions were left to the SPCA but in this case police were prosecuting because the offender faced several other charges as well, Mr Robinson said.
The dog was understood to be a "lovely" whippet-labrador cross.
The maximum penalty for wilful ill-treatment of an animal is five years' jail or a fine of $100,000.