A Texas man who was missing for months was eaten by his pack of dogs, the sheriff’s deputies said. The Johnson County Sheriff's Office said 57-year-old Freddie Mack was last seen on April 9.

Authorities said they arrived at Mack's home on May 6 to conduct a search but were unable to enter the property due to 18 "aggressive dogs." Deputies made several attempts in the next few days to search the area for Mack. They even used drones but did not find any sign of the man at the property.

Days later, detectives were able to enter the property and found small bone fragments in a trailer and shed on the property. Medical examiners said Tuesday that DNA testing revealed that pieces of bone recovered from the dogs’ feces were those of Mack, according to the Johnson County Sheriff’s Office. Deputy Aaron Pitts said the 18 mixed-breed dogs apparently devoured all of Mack’s body, his clothing and his hair. All the bone fragments were not larger than 2- to 5 inch.

“Never have we ever, or anyone we’ve spoken to, heard of an entire human being consumed,” Pitts told the Associated Press. “The bones were completely broken up and eaten.” 

Authorities also said Mack had serious health problems, and it's unclear whether the dogs killed him or consumed his body after he died from a medical condition.

"Either way, it is a very gruesome event and we extend our sympathy to Freddie Mack's family," Sheriff Adam King said in a statement.

Authorities said two of the dogs were killed by their mates, 13 were euthanized because of their “aggressive nature” and three were put up for adoption.

Earlier this year, a South Carolina woman died after her two boxer-mixes mauled her outside her home, “eating her alive.”

dog In this image, a Dobermann dog is seen running toward his trainer in Beirut, Lebanon, Oct. 27, 2010. Photo: JOSEPH EID/AFP/Getty Images