A Ridgeville couple who lost their baby in an April dog mauling have had their remaining two children placed in protective custody for the second time since the attack, authorities said.

The state Department of Social Services confirmed Thursday that Quintin and Chantel McGrew’s children have been removed from the home while an investigation is being conducted.

DSS spokeswoman Marilyn Matheus would not disclose specifics about the investigation or reveal what prompted the move. “The parents are cooperating in providing for the safety of the children pending the investigation,” she said, declining further comment.

Andy Savage, an attorney for the family, did not return a phone call seeking comment on the situation.

No one answered the door at the McGrews’ mobile home Thursday afternoon. A neighbor told a reporter to leave the property, pointing to a “No Trespassing” sign.

DSS initially removed 7-year-old Samantha and 2-year-old Robert from the McGrews home after the April 20 dog attack.

The couple’s adopted dog, a Labrador retriever mix named Bo, dragged baby Aiden from a bouncy swing in the family’s living room and killed him. State officials euthanized the dog.

The Dorchester County Sheriff’s Office arrested Quintin McGrew, 28, who had been sleeping at the time of the attack, on a charge of unlawful conduct toward a child. He is currently free on bail.

After nearly two months, the McGrews were reunited with Samantha and Robert in June after a Dorchester County family court judge signed an order returning custody to the couple. The children had been staying with Chantel McGrew’s mother.

The order said the McGrews complied with their treatment plan and that DSS and the children’s court-appointed guardian “agree and believe that it is in the best interests of the minor children” to be returned to their parents.

Dorchester County Sheriff’s Lt. Tony Phinney said Thursday that investigators received no prior notice of DSS’s plans to return the children to protective custody. He said he had no other details to provide.