Child Youth and Family is investigating a video in which a young boy is seen sculling from a beer bottle as part of a Neknominate dare.
The video of the boy, understood to be 6, was posted on image-sharing social networking site Instagram.
Holding a green Heineken bottle, the boy throws his head back as he starts to down the drink.
After a few seconds, he struggles, as a voice in the background eggs him on: "Keep going, keep going!"
A woman sitting to the side of the boy then reaches to take the bottle out of his hand while saying: "That's all right. No, no, no, that's enough."