Fig. 1.

Contrast in liver color at D4 and D20 post-hatch. The yellow color at hatch is indicative of the absorption and storage of yolk lipid and nutrients that occurs during late embryonic development. The liver gradually changes to deep red as the chick grows, concurrent with the depletion of the liver’s stores. Tissue was routinely sampled from the lower left lobe, as indicated by the red boxes. Note: Liver sizes are not on the same scale