He said Garfield was an exotic breed, red without any white like his namesake, that can bring up to $1400 at sale. However, the couple got him as a rescue cat for the cost of neutering and vaccination.
Garfield had been caged for most of his life and distrusted everybody at first, Mr Walker said. He had a buddy cat at his new home called Nermal (named after cartoon Garfield's feline friend) who also had since died.
Mrs Walker said Garfield had eventually settled and became fast friends with any foster children the couple brought home.
The couple buried Garfield in their garden and on Sunday their grand-daughter placed fresh flowers at his grave.
"Garfield was just so sweet and gentle. He used to put the kids instantly at ease. He really was a social worker cat," Mrs Walker said.
He also had a broad heroic streak that was probably his undoing when the teenagers were attacked.
"If they were calling for help, Garfield would have gone to help. He was like that," Mr Walker said.
Their half-ragdoll cat called Hairy Potter has inherited the job as comforter at their home but Garfield is sorely missed all the same.
"Yeah, I think curiosity got the cat. But the dog is still out there and we don't another attack on a child.
"That's why we keep our foster daughter and Hairy Potter inside with us," he said.
Mr Walker said the couple also had lost five hens at their property to a mystery dog about a year ago.
Masterton head dog ranger Malcolm Falk said yesterday he suspected the dog that attacked the teenagers and killed Garfield, had been taken from the area.
"We've searched high and low and found nothing that matches. But we're keeping our eyes peeled,"Mr Falk said.