Previously, lower post‐prandial increases of cholecystokinin (CCK) and peptide YY (PYY) with a HF diet (crude protein (CP): 30.7 g/100 g dry matter (DM); crude fat (CF): 21.3 g/100 g DM; and carbohydrates: 32.2 g/100 g DM) when compared to a HC diet (CP: 26.9 g/100 g DM; CF: 10.5 g/100 g DM; carbohydrates: 46.6 g/100 g DM) were found. The gene discussed is PYY; the disease is hydrops fetalis.