Lt. Glenn Giannantonio says eight American bulldogs were loose in the Fallbrook backyard where the 30-year-old was found on Sunday.
The woman had been hired to clean the house while the residents were out of town. She was discovered by a family member who came to pick her up.
An autopsy revealed the woman had been mauled by at least one dog, causing her death.
Animal control officers have impounded the animals, and will investigate to determine whether criminal charges should be filed against the homeowners.
The homeowners will also be investigated for having 24 marijuana plants.