DENNIS, Mass. (AP) – The future of a dog trained to help a woman using a wheelchair is in question after it mauled and killed a much smaller terrier at a Cape Cod dog show.

Evelyn Galloway, 74, and her Yorkshire terrier named Libby had just performed at “Pooches on Parade” at the Dennis Senior Center on Thursday when Rafferty, a nearly 100-pound Bouvier des Flandres, attacked Libby and “picked her up like a rag doll,” Galloway said.

Three people wrestled the four-pound terrier out of the jaws of the “service dog”owned by Autumn Daniels.

port, who uses a wheelchair.

An on-duty animal control officer heard the commotion and rushed to help. Libby was rushed to an animal hospital in Hyannis, but died about 30 minutes into surgery, Galloway told The Cape Cod Times. The show continued after the incident, according to dog owner Estelle Hill.

Animal Control Officer Cheryl Malone said Daniels told her she trained Rafferty herself.

Malone said she will recommend that Rafferty wear a muzzle in public, at the least, but the dog’s fate has not been decided. The Times could not reach Daniels for comment.

There are no federal guidelines for training and certification to ensure service animals are safe, said Michelle Cobey, who works in resource support for the Delta Society, an international nonprofit that matches the disabled with professionally trained animals.

Under Americans with Disabilities Act guidelines, a dog is considered a service dog if it has been “individually trained to do work or perform tasks for the benefit of a person with a disability.”

AP-ES-09-25-04 2059EDT