In recent years, enhanced-growth feeding programs in dairy calves
have been widely studied. It consists to feed calves high amounts
of milk or milk replacer to achieve their potential growth. When
calves are fed with an enhanced-growth feeding program grow around
800-1000 g/d in contrast to conventional feeding programs, that
limits the offer of milk replacer to 500 g/d and calves only grow
450 g/d. Conventional feeding programs are conceived to stimulate
starter consumption to improve rumen development and wean calves as
soon as possible. This work consists on four studies that compare
conventional and enhanced-growth feeding programs. In all the
studies, conventional-fed calves consumed more starter during the
preweaning period than enhanced-fed calves, but this difference was
only maintained until one or two weeks after weaning. Although
enhanced-fed calves maintained a numerical advantage in body weight
compared with conventional-fed calves later in life, this advantage
did neither reduce the age at breeding nor improve fertility at
first breeding in enhanced-fed calves.
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