A version of the video that has received 1.5 million views was posted by a user who called for the US mother to be arrested.
The 10-second clip shows the hand of an adult off-screen holding what appears to be a cigarillo to the child’s lips.
The child then makes a cooing sound and appears to inhale before letting out a puff of smoke.
Read the entire post and watch the video at ABC.net.au