The oxygen isotopes revealed that the tooth captured roughly six months of growth, from winter to summer, whilst the carbon isotopes showed the animal’s diet changed with the seasons: woodland fodder in winter and open pasture in summer. Additionally, the strontium isotopes indicated the seasonal food sources came from different geological areas, suggesting that the cow either moved seasonally or that winter fodder was imported.
The lead isotopes revealed composition spikes during the late winter to spring, pointing to a lead source that was older than the lead in the rest of the tooth. The composition suggests the cow originated from an area with Palaeozoic rocks, such as the bluestones found in Wales, before moving to Stonehenge.
This is the first time that scientists have seen evidence linking cattle remains from Stonehenge to Wales, adding further weight to theories that cows were used in the transportation of the enormous rocks across the country.