ST. CLAIR TOWNSHIP, Ohio -- Three miniature horses were killed when they were attacked by loose dogs, reports say.

According to WCPO Channel 9, at least three dogs killed and began eating one miniature horse, and injured two other miniature horses so badly they had to be euthanized.

Mike Powell tells WLWT Channel 5 that he saw the dogs attacking two of his miniature horses, Bella and Pablo, when he went out to feed them on Friday.

"I looked down there and I couldn't believe what I saw. I basically saw these three dogs eating our horse," Powell tells WKRC Channel 12.

He managed to shoot and kill one of the dogs, a pit bull.

It's believe the two other dogs that escaped also are pit bull breeds.

Powell tells WCPO the damage the dogs did to the horses was horrific. Powell and his wife owned the horses with Paul Huesing.

"These poor animals were just savagely torn apart because of an irresponsible dog owner. I'll never be the same," Huesing tells WKRC.

According to WKRC, a few hours later a woman who lives near Powell found the dogs attacking her miniature horse. Her husband used rocks to fend them off and a pet donkey was injured while trying to protect the horse.

The horse had to be euthanized because of its injuries.

Kurt Merbs, the dog warden in Butler County, tells WKRC the dogs' behavior is unusual.

"We don't really see them kind of team up like this and take down bigger animals. I've been here almost 11 years and haven't seen this," he said.

Investigators are trying to determine who owns the dogs, reports say.

St. Clair Township is located between Cincinnati and Dayton.