A woman has admitted intimidating the owners of a guinea pig farm who were targeted for six years by activists.
The Hall family suffered a six-year campaign by activists
Madeline Buckler, 24, of Manchester, wrote letters to those associated with Darley Oaks Farm in Newchurch, Staffs, which contained veiled threats.
During the campaign against the farm the body of a family member was stolen from a graveyard in nearby Yoxall.
Buckler, who was not involved in the grave theft, will be sentenced for the intimidation later this month.
She had denied three counts of blackmail and one count of attempted blackmail.
The letters, which were sent in November 2005, demanded the release of the animals and threatened consequences if they were not.
Her letters coincided with a long-running campaign against the Hall family farm by animal rights activists which came to national attention when the body of Gladys Hammond was stolen in October 2004.
The 82-year-old's remains were discovered on Cannock Chase in May after a tip-off by one of four activists who admitted their part in the grave theft.
Buckler was bailed and will be sentenced for "intimidation of persons connected with an animal research organisation" on 22 September.