"Upon inspection, we discovered a formula sample had been torn open in this morning's mail delivery," a spokesperson for the Mead Johnson Nutrition Co. said in an e-mail release on the incident Thursday.
Mead Johnson makes formula for children at its Zeeland facility.
The spilled formula incident was reported at 1:30 p.m. It led to a brief police and fire department response to the Main Street facility.
In May, emergency crews evacuated the Mead Johnson facility due to a chlorine leak. Seven people were treated in that incident.