"I want to take action against CYF myself, but I haven't seen a lawyer yet.''
She said it wasn't just the CYF case worker who was at fault, but the entire organisation.
"Someone's got to be responsible.
"They took the boy off his mother because she couldn't care and protect him and they've sent him to people who (also couldn't protect him).''
The boy was sent to the Towns' home in Whakatane from Hamilton.
The grandmother said she did not know why he had to be sent so far away when other family members had offered to look after him.
The Towns were given home-based and community work sentences, which the grandmother said was "disappointed''.
"I think they should have gone to jail.''
CYF was unavailable for comment this afternoon.
The court was told the couple subjected the boy to regular cold showers three times a day, and on May 11 Eunice Towns became so enraged she put the child in a cold shower for 5-10 minutes.
When the unconscious toddler was examined at Whakatane Hospital he was found to be suffering from life-threatening hypothermia, and also had 73 bruises and 10 abrasions all over his body.
Judge Louis Bidois said it was "inconceivable'' that Eunice Towns would not have realised the repercussions of subjecting the toddler to repeated cold showers.
"You could easily have been facing a manslaughter charge if the boy had died,'' he said.
He sentenced her to nine months' home detention and 180 hours' community work.
He sentenced her husband to nine months' intensive supervision and 300 hours' community work, and also ordered him to pay $1000 emotional harm repayment to the victim.