A search of Weibo, China's version of Facebook, last night showed little interest, and those who did comment were more concerned about the threat to New Zealand than the milk.
"There are unscrupulous people everywhere," said one user.
At New Zealand's online Chinese community site, SkyKiwi, comments also circled around whoever was behind the act.
"[If] this person threatens to put poison in powder milk to kill children, I hope this person will be caught," said one person.
Fearful mum will stock up
Worried mother Eva Chen said she will be stocking up on baby formula following the threat to contaminate infant milk powder.
"I have two babies who still depend on formula milk so I will just be going out and get as many as I possibly can," said the 34-year-old, originally from Taiwan.
"I am so worried after reading the news, I thought such things only happen in China and not in New Zealand."
Ms Chen, a mother of four, runs the Chinese family services at the Wellbeing Charitable Trust, and provides support for new Chinese mothers. "It is no consolation that the police are saying the threat is low, because it is still a threat," she said.
"The lives of my babies are too valuable and important for me to take any risk."