That pigs, cattle, humans and even a dog came to the Stonehenge area from distant parts in prehistory has been one of the more interesting scientific discoveries of recent times. The links to Orcadian culture has also been speculated on.
Behind the headlines and speculation there is solid research - some links to start from:Evans, J., Parker Pearson, M., Madgwick, R. et al. Strontium and oxygen isotope evidence for the origin and movement of cattle at Late Neolithic Durrington Walls, UK. Archaeol Anthropol Sci 11, 5181–5197 (2019). https://doi.org/10.1007/s12520-019-00849-w
Gordon J. Barclay & Kenneth Brophy (2020): ‘A veritable chauvinism of prehistory’: nationalist prehistories and the ‘British’ late Neolithic mythos, Archaeological Journal, DOI: 10.1080/00665983.2020.1769399
The ‘omphalos of Britain’: iconic sites and landscapes, methodological nationalism and conceptual conservatism in the writing of ‘British’ prehistory. A reply to Madgwick and collaborators 2021 Gordon J. Barclay and Kenneth Brophy DOI: 10.6084/m9.figshare.17296994