Prepartum nutrient intake and colostrum yield and composition in ruminants.

Increased colostrum lactose concentration is also associated with greater colostrum yield and reduced protein and Brix% in dairy cattle ([83]), supporting the concept that colostrum yield may dilute component concentrations. Imposing mid to late-gestation nutrient restriction reduced first-milking colostrum yield (within 1 h postcalving) in beef cattle ([56]; [72]) without altering colostrum IgG concentration ([56]; [72]) but compromised total IgG yield ([72]). Colostrum IgG yield is often not reported in dairy and beef cattle, although one study noted that there was no difference in colostrum IgG output between treatments, despite colostrum IgG concentration being decreased ([84]). By contrast to cattle, colostrum yield in sheep appears more sensitive to protein supplementation during late gestation, with most studies indicating that increased protein intake (at times, in conjunction with greater RUP intake) increases colostrum yield ([38]; [3]). Keywords: cattle; colostrum; immunoglobulin G; prepartum; nutrition; sheep EN cattle colostrum immunoglobulin G prepartum nutrition sheep 24 36 13 06/20/23 20230601 NES 230601 Implications Many cattle and sheep do not produce enough colostrum for their offspring. [Extracted from the article]