Police say they believe 55-year-old David Christopher was attacked and killed by his own dog.
"I was kind of dumbfounded," said Ed Lukasavage about the news.
Lukasavage said Christopher's Doberman often played with his own Rottweiler.
"I mean, you've got to meet the dog. It just doesn't seem like they type of dog to do a mauling," Lukasavage said.
"[He's] just like any other dog," Lukasavage remembered. "The first thing the dog would do when it comes up to you is it wants its belly rubbed."
Police say a relative found Christopher dead in his home on River Drive in Plover on Wednesday.
"It's still being investigated." Plover Police Sgt. Dwayne Wierzba said. "We're waiting for the final reports from the coroner's office.
Neighbors say Christopher had gotten the dog from the Portage County Humane Society a few months ago. Workers there refused to comment on the case, but News Channel 7's newspaper partner reports that Nancy Butterfield, operations director for the PCHS said the dog had no record of aggression or neglect with her agency.
The dog was brought to the humane society after Christopher's death and euthanized. The state crime lab and the medical examiner's office in Madison are assisting Plover police with the investigation.