In general, lamb immune variables (IgG and IgM
concentrations, ChT activity, and complement system
activity) and BW were not affected by either colostrum
source (goat vs. sheep) or TFCF (2 vs. 14 h) during the
first 5 d after birth and at d 20 of age. Further studies
with other colostrum amounts (8 and 16 g of IgG/
kg of BW) are necessary to determine whether higher
plasma immune variables and greater BW in lambs
could be obtained during these first days after birth.
These findings may improve management systems in
lamb farms. Based on our results, it is not necessary to
feed colostrum immediately after birth and goat colostrum
can be used to bottle-feed newborn lambs without
consequences for their immune system and BW.