Authorities released the call on Monday.
No charges were immediately filed in the case. The six children were removed from the home. Most were physically or mentally disabled. Four were sent to the hospital and remain hospitalized.
The mother told 911 that the toddler was "stiff as a board" when she and her husband woke up Nov. 6 in Vermilion.
While on the 911 call, the mother asked family members, "When's the last time somebody went in there to check?"
An autopsy attributed the boy's death to malnourishment and dehydration.
Neighbors say they've seen little of the family.
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