Police believe mother Mabel Jo Larsen, 32, and the baby's father, Aaron Michael Parker, 34, kept the child a secret after Child Protective Services took away five of their other children.
Both parents plead guilty to child injury last year and officials found evidence of narcotics at the residence.
Both are on probation for previous child abuse and neglect cases, investigators said.
Three years ago, Child Protective Services removed five other children from the home.
A 10-year-old was found to have suffered emotional and physical abuse.
'She was skin and bones. She was being held to a weigh bench with zip ties,' said neighbor Shanna Hopkins to KHOU.
CPS was shocked to hear that another child was in their care.