Kim stated in court he had wired the chickens' beaks to make them quiet.
SPCA Auckland director Bob Kerridge said the chickens would have experienced huge distress.
"According to the vet who inspected the chickens, the birds would have suffered considerable pain during the procedure," he said.
"The use of such barbaric measures on hens is utterly unacceptable.
I would like to extend our thanks to the member of the public who alerted us to the animals in distress and ultimately led to their rescue."
Kim has been ordered to pay veterinary costs of $1122.86 and legal costs of $2265. He was also disqualified from owning any poultry for five years.
The chickens have been re-homed by the SPCA.