The concept of later weaning to enhance feed intake
and maintain growth rates during weaning has been established
in piglets and beef calves, which are fed milk
preweaning ad libitum. However, this concept has not
been established in dairy calves. For example, piglets
weaned at 21 d compared with 12 d had higher ADG
at weaning, as well as improved weights later in life
at finishing (Main et al., 2004). Similarly, the growth
advantage immediately after weaning was sustained
in this experiment until months after weaning. The
sustained growth increase in the current experiment is
unique, as it moves beyond previous studies relating
to superior growth from preweaning schemes, which
typically did not demonstrate longer-term growth advantages
for the months after weaning (Shamay et al.,
2005; Davis-Rincker et al., 2011).
The concept of later weaning to enhance feed intakeand maintain growth rates during weaning has been establishedin piglets and beef calves, which are fed milkpreweaning ad libitum. However, this concept has notbeen established in dairy calves. For example, pigletsweaned at 21 d compared with 12 d had higher ADGat weaning, as well as improved weights later in lifeat finishing (Main et al., 2004). Similarly, the growthadvantage immediately after weaning was sustainedin this experiment until months after weaning. Thesustained growth increase in the current experiment isunique, as it moves beyond previous studies relatingto superior growth from preweaning schemes, whichtypically did not demonstrate longer-term growth advantagesfor the months after weaning (Shamay et al.,2005; Davis-Rincker et al., 2011).
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