This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
Food intake in incubating (INC), pair‐fed control (PFC) and pair‐fed control hens released from restriction (PFC released). The grey dotted line indicates where incubation behaviour was recognised and the data for pair feeding began to be collected. The black arrow indicates when the pair‐fed control released hens were released from restriction (n = 12; mean ± SEM).