An inquest has heard how Sandra Wiltshire and her pet dog Bruce were killed when they were trampled by cows in Chippenham last October.
The inquest in Salisbury is being heard in front of a jury who were told there was no public right of way through the field.
The jury was told that a fellow dog walker had found Sandra following the attack. She then lost consciousness and never recovered. A farmer told the inquest he believed the presence of a dog in the field would have caused the cows to react and trample Sandra.
Two dairy farmers from Dorchester are defying convention by milking their herd of 500 cows in the field in a mobile milking parlour. The cows and and parlour move around the 900 acres of rented pasture.