The closeness of the dog and handler was obvious from their arrival, Coomer said.
In a "tight bond like this" the dog responded to its owner's voice ahead of every other person talking.
The dog's handler had been by the dog's side as he received treatment.
Coomer is no stranger to saving the lives of Northland's police dogs.
Two years ago, the specialist vet treated 20-month-old Caesar, who had only clocked up two weeks on the beat with his handler Constable Josh Van Der Kwaak when he was stabbed in the head by a man resisting arrest at a home in Parua Bay, Whangārei.
Coomer said groups like The Working Dog Centre based in Massey University, alongside other specialist vets and nurses, meant the country's police dogs were in "incredible" hands.