The fulacht fia, a type of site found in large numbers across Ireland and typically consisting of a mound of fire-cracked stone accumulated beside a water trough used for boiling, does not simply neighbour the local ringfort here. It has been partially cut through by the ringfort's fosse, the defensive ditch that encircles the enclosure, meaning the later builders either did not notice the older site or did not consider it an obstacle worth avoiding.

What survives is a spread of burnt material seven metres wide, visible for eighteen metres along the edge of the fosse. That spread is the characteristic signature of fulacht fia activity: stone shattered by repeated heating and quenching, discarded in quantity over time. The relationship between the two monuments raises a quietly interesting question about continuity and erasure in the landscape. Ringforts in Ireland are generally associated with the early medieval period, while fulachta fiadh are predominantly Bronze Age in date, placing a gap of perhaps two thousand years between the original use of this cooking site and the moment a ringfort builder's spade cut across it. Two further fulachta fiadh lie to the south-west and south-south-west, suggesting this area of Rathaneague saw repeated use over a long span of prehistoric time, with cooking or processing activity clustered in a way that is not unusual for the monument type, which tends to favour low-lying, wet ground near water sources.