The Michigan Humane Society said Tuesday their investigation indicates that more than a dozen animals at a farm in Detroit weren't killed by a human.
MHS veterinarians who examined the remains of five goats, eight chickens and a cat said their injuries were consistent with dog bites.
The animals were found dead May 31 at a farm on the property of Catherine Ferguson Academy. The farm and animals were cared for by students.
MHS said they weren't sure if the attacks were made by a single dog or multiple dogs.
In the meantime, several animal groups have contacted the school about donating new animals for the farm.