Four adults, including the parents, are now charged.
Police describe the house in Portage as uncomfortably hot inside, with ants crawling around, and dirty clothes and dishes strewn about.
Officers removed an infant, a 2-year-old boy and a 5-year-old girl.
The Times of Northwest Indiana reports the parents, Brandon and Eileen Wise, face neglect charges.
Twenty-year-old Jasmine Hernandez and 21-year-old Kyle Witten also face several charges.