Upon sentencing, Judge Ross said it needed to be made clear this type of offending was distasteful, especially in a rural community, and needed to be deterred.
He said there was no excuse for the killings, which had included one pet lamb. A pre-sentencing report stated Hanson was driven by the company of others but had accepted the "wrongness" of the crime.
He also faced one charge of possession of cannabis and received nine months supervision. He was ordered to undergo a drug and alcohol assessment and adhere to any consequences pending its outcome.
Hanson was also convicted for the theft of one goat and received three months loss of license due to the involvement of a motor vehicle.
A reparation order of $680 was also made.
His co-offenders are making their way through the court system.