The 5-year-old dog, which was taken by council's dog control officers, was also destroyed with the family's consent after five months of continued impoundment.
Des Hughes, 41, was prosecuted by Hastings District Council after his family Labrador, Franklin, bit a member of the public who was unknown to the family.
The 51-year-old male victim had the tip of his left thumb bitten off in the incident.
The dog had only its nose jutting out from under the gate, which was set back from the footpath, when the bite occurred on May 31, 2011.
Mr Hughes appeared in Hastings District Court yesterday to continue to defend a charge of owning a dog that attacked, causing serious injury.
A hearing part-heard in November last year was adjourned for both parties to argue whether the Labrador was deemed "under control" at the time of the incident.
Mr Hughes told Hawke's Bay Today he agreed to euthanise the dog as it was going mad in the pound.
"It wasn't fair on Franklin," Mr Hughes said. "We walked him as often as we could but every time we walked him he thought he was coming home. It was heartbreaking. The court case was dragging on so it was the only option we had."
Mr Hughes' lawyer, Karl Sandbrook, yesterday told the court his client had taken all steps possible to keep the dog under control.
This judge needs to understand that a dog on its own property should be allowed to defend itself and its property, that is why some of us have dogs. The Victim is an idiot and it should be him that was charged for "Manipulation of an Animal" and the subsequent cruelty that occurred from this poor dog being impounded.
Judge Rea you are wrong and the Victim is the offender in this not Mr Hughes or his dog. Shame on you.