The dog - a female 1-year-old fox terrier-Staffordshire cross named Shadow - was being cared for by the woman who owned Diesel, the Jack Russell killed in the prolonged attack on February 1.
SPCA inspector Stephanie Saunders removed Shadow on Friday, following a tip-off from a member of the public concerned for her welfare.
The dog, who was not registered, would be held by the SPCA until a new home could be found. She was in good condition and there was no suggestion she had been ill-treated, Ms Saunders said.
However, she was concerned to find the dog at the address, after the woman said - following Diesel's death - she would not own another dog.
Given the failure to supervise Diesel before his death, Ms Saunders said she did not consider the woman a "suitable owner".
"Legally, she couldn't be prosecuted . . . morally, she allowed the dog [Diesel] to be tormented. Basically, it all started with her.
"She couldn't offer supervision then. I wonder if she can now," Ms Saunders said.
Contacted yesterday, the woman - who would not give her name - insisted she was not a bad dog owner, but was trying to "start fresh".
Her 10-year-old son had returned home with the dog - who had an injured ear - three weeks ago, and she had agreed to look after her until a new home could be found.
She now believed that was a mistake, and she "should have made my son take it back".
"I was just worried about what people think, especially after the case and all that," she said.
In May, Jeffrey Robin Hurring (19) - a friend of the woman - pleaded guilty in the Dunedin District Court to wilfully ill-treating Diesel.
The attack, which lasted more than half an hour, led to Hurring being sentenced to 12 months in prison - the longest penalty for animal cruelty ever handed down in New Zealand.
The court heard Hurring had been drinking at the Stenhope Cres home when the woman said Diesel needed to be put down, and Hurring agreed to carry out the attack.
SPCA inquiries had also found Diesel had, in proceeding weeks, been constantly teased by neighbourhood children, including having a vacuum cleaner attached to its testicles.
