More feedings sounds like it should mean more antibody absorption, but this study tested that assumption directly. Researchers compared a low-frequency feeding protocol (two feedings within 12 hours) against a high-frequency one (three feedings) to see if the extra feeding actually improved IgG absorption. For producers managing calving season labor, this is worth knowing if it turns out the third feeding isn't adding much beyond the first two.
"Effects of a low- or high-frequency colostrum feeding protocol on immunoglobulin G absorption in newborn calves" — A.J. Lopez, T.T. Yohe, J. Echeverry-Munera, M. Nagorske, D.L. Renaud, M.A. Steele. J Dairy Sci. 2022 Jul;105(7):6318-6326.