“…,RAPA (especially at 1.2 mg/kg BW) …, β-casein, and amino acid contents (Asp, Thr , Ser, Glu, Gly, Ala, Cys, Val, Met, Ile, Leu, Tyr, Lys, His, Arg, and Pro) of crop … of albumin, total protein, and uric acid in the serum of breeding pigeons (P < 0.05).”