This volume presents the results of the analysis of the animal bone assemblage from recent excavations of the medieval settlement at Knowth, Co. Meath. The assemblage represents one of the largest excavated to date from this period, and the study therefore provided the opportunity to review the zooarchaeological evidence for Early Christian Ireland and to place the Knowth results in context. The principal conclusion drawn from the analysis is that the evidence from Knowth, along with that from other contemporary sites, shows that there was a major shift in the livestock economy of Ireland from the ninth century AD onwards.