Feed Strategy - November 2019 - 32

32 ❙ FeedStrategy
CRITICAL JUNCTURES
7 days before oviposition
The hen takes about a week to
deposit all nutrients required to form
the yolk, and a further single day to
create the rest. Thus, the yolk is of
primary importance as a source of
lipids, proteins, vitamins, minerals,
pigments (antioxidants), and many
biofactors. If yolk formation does
not proceed as expected, the hen
will not deposit the egg until the
yolk is fully formed. During this
critical period, it is the liver of the
hen that does most of the work, and
its health should be a focal point of
interest to any nutritionist.
Likewise, this is the time to
potentially influence the composition of the yolk with substances
that can be transferred to the chick.
Some components are difficult to
change (lipid concentration, but not
its composition), whereas others are
easily manipulated (pigmentation).
Egg yolk formation is an underappreciated period as part of early
chick nutrition.

4 days before hatching
This is the time when in-ovo feeding
has shown the most promise, but
despite all noise and research,
results remain equivocal. The
science behind the concept remains
solid. It is just the lack of practical results that prevents us from
using in-ovo feeding to enhance the
quality of the chick. Nevertheless,
efforts continue in different directions and hopefully a breakthrough
will soon appear. Apart from

As soon as the chick is hatched, it needs water and nutrients, like any
other living organism. irinachevzhik | AdobeStock.com
nutrients, which the hen already
makes sure are present in the egg, in
ovo is now switching to additives
due to fund availability and perhaps
easier manipulation of egg contents.

24 hours post-hatch
As soon as the chick is hatched, it
needs water and nutrients, like any
other living organism. Likely for it,
there is a good part of the egg yolk
that has been resorbed into its gastric
cavity acting as a resource of such
nutrients - and perhaps other vital
components of which we have little
or no appreciation. Again, providing
external feed and water right after
hatch and just before placement is an
area of tremendous interest because it
can markedly improve chick quality
and lifetime performance.
There are, however, so many
practical difficulties in doing so, but
ingenuity runs apace with difficulties, and numerous products on the

market promise great results, often
with disappointing outcomes.
Again, the role of residual egg
yolk is paramount and brings us
back to the beginning, whereas the
provision of external nutrients and
water should continue to occupy
the minds of researchers, especially
when the time from hatching to
placement extends beyond 24 hours.

4 days post-placement
Modern chicks require modern
nutrition, if only because they no
longer have time to catch up later.
With a modern genetic line being
marketed at less than 42 days at
above 2 kg live body weight, there
is no time to lose. Thus, the feed
offered right after placing chicks
under the brooders matters the most.
No longer is the typical cornsoy prestarter enough for them, as
it takes them back ever so slightly.
Modern feeds contain ingredients
www.FeedStrategy.com ❙ November 2019


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Feed Strategy - November 2019

Table of Contents for the Digital Edition of Feed Strategy - November 2019

Feed Strategy - November 2019
Contents
In the Mix
FeedStrategy.com
Climate change and animal feed: mycotoxin risk mitigation
How to adapt to the changing mycotoxin landscape
Scientists seek new ways to combat spread of mycotoxins
Feed additives that will succeed in 2020 and beyond
Marketing nutrition by extending credit
More feed, fewer mills: feed industry consolidation
How to target protein content in late-lactation cow diets
Critical junctures in early chick nutrition confi rmed
How pelleting influences particle size in animal feed
Products
Advertisers’ Index
Feed Strategy - November 2019 - CT1
Feed Strategy - November 2019 - CT2
Feed Strategy - November 2019 - Feed Strategy - November 2019
Feed Strategy - November 2019 - Cover2
Feed Strategy - November 2019 - CT3
Feed Strategy - November 2019 - CT4
Feed Strategy - November 2019 - Contents
Feed Strategy - November 2019 - In the Mix
Feed Strategy - November 2019 - FeedStrategy.com
Feed Strategy - November 2019 - Climate change and animal feed: mycotoxin risk mitigation
Feed Strategy - November 2019 - 5
Feed Strategy - November 2019 - 6
Feed Strategy - November 2019 - 7
Feed Strategy - November 2019 - How to adapt to the changing mycotoxin landscape
Feed Strategy - November 2019 - 9
Feed Strategy - November 2019 - 10
Feed Strategy - November 2019 - 11
Feed Strategy - November 2019 - Scientists seek new ways to combat spread of mycotoxins
Feed Strategy - November 2019 - 13
Feed Strategy - November 2019 - 14
Feed Strategy - November 2019 - 15
Feed Strategy - November 2019 - Feed additives that will succeed in 2020 and beyond
Feed Strategy - November 2019 - 17
Feed Strategy - November 2019 - 18
Feed Strategy - November 2019 - 19
Feed Strategy - November 2019 - 20
Feed Strategy - November 2019 - 21
Feed Strategy - November 2019 - Marketing nutrition by extending credit
Feed Strategy - November 2019 - 23
Feed Strategy - November 2019 - More feed, fewer mills: feed industry consolidation
Feed Strategy - November 2019 - 25
Feed Strategy - November 2019 - 26
Feed Strategy - November 2019 - 27
Feed Strategy - November 2019 - How to target protein content in late-lactation cow diets
Feed Strategy - November 2019 - 29
Feed Strategy - November 2019 - 30
Feed Strategy - November 2019 - Critical junctures in early chick nutrition confi rmed
Feed Strategy - November 2019 - 32
Feed Strategy - November 2019 - 33
Feed Strategy - November 2019 - How pelleting influences particle size in animal feed
Feed Strategy - November 2019 - 35
Feed Strategy - November 2019 - 36
Feed Strategy - November 2019 - 37
Feed Strategy - November 2019 - 38
Feed Strategy - November 2019 - Products
Feed Strategy - November 2019 - Advertisers’ Index
Feed Strategy - November 2019 - Cover3
Feed Strategy - November 2019 - Cover4
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