Figure 3. Figure 3. Effect of Ig source on apparent absorption of Ig at 24-h in colostrum-deprived calves. Colostrum treatment delivered 50 g Ig/L. Supplements consisted of a commercial milk-derived supplement (Supplement 1; First Milk Formula, Procor Technologies Inc., Arden Hills, MN), a commercial milk-derived supplement from another company (Supplement 2; Colostrx, Protein Technology Inc., Santa Rosa, CA), and a bovine-serum-based supplement (Bovine Serum; LifeLine, American Protein Corp., Ames, IA).