Hundreds of prehistoric dogs found buried throughout the southwestern United States show that canines played a key role in the spiritual beliefs of ancient Americans, new research suggests.

Throughout the region, dogs have been found buried with jewelry, alongside adults and children, carefully stacked in groups, or in positions that relate to important structures, said Dody Fugate, an assistant curator at the Museum of Indian Arts and Culture in Santa Fe, New Mexico.

Fugate has conducted an ongoing survey of known dog burials in the area, and the findings suggest that the animals figured more prominently in their owners' lives than simply as pets, she said.