Two women who are suspects in the beheading of a pit bull were arraigned Thursday on charges of threatening the dog's owner.

Rebecca Clancy and Kelly Hayden, who operate a kennel in Mashpee on Cape Cod, were arrested Wednesday after a 22-year-old woman told police they threatened her after she found her dog's severed head in a tin on her car last week. They pleaded not guilty Thursday to charges of threatening, intimidating a witness and assault related to that incident.

Hayden and Clancy, both 24, are suspects in the beheading of the woman's dog, according to court records. They have not been charged in the dog's killing.

Click here for more Crime news.

The dog's owner, Dare Paige, told police that the women were supposed to be watching her dogs — Nitrous and Nala — last week when Nitrous's severed head turned up on the hood of her car in East Falmouth. She said Clancy had threatened to kill her dogs if she did not pay her $15,000 for damage she had caused to Clancy's Jaguar when she borrowed the car and crashed it in November.

The women are charged with attempting to intimidate the dog's owner because she is a witness against them in the investigation the animal's death.

Clancy told the Cape Cod Times shortly before her arrest that she and Hayden did not kill the dog. Clancy said the people speaking against her and Hayden are rival dog breeders.

An attorney who represented the women at their arraignment did not immediately return a call seeking comment Thursday.