Several horses in Cherry Valley, Ohio, were found dead and 11 turned up missing at a farm that had been under surveillance by the county humane society because of reports that the animals were underfed.

No charges have been filed in the investigation in this northeast Ohio community, the Ashtabula County sheriff’s office said Friday. Only one pony was left at a farm where two horses were found dead, two others apparently were buried and 11 horses were missing, Ashtabula County Humane Society agent Donna Yen said.

Last week, society agents, who have been monitoring the condition of the horses for more than a year, noticed the herd was missing. The agents, accompanied by sheriff’s Deputy Taylor Cleveland, found fresh graves and a dead horse covered in snow. "The horses presumably died of starvation or dehydration, or a combination of starvation and dehydration," Yen said.

The horse owner denied neglecting the animals and told Cleveland that she believes the animals were poisoned, according to police reports