Feed Strategy - May 2018 - 37
FeedStrategy ❙ 37
FORMULATION OF AN IDEAL feed will positively
influence the upcoming animal welfare discussion.
of an immune response is the reduction in feed intake followed by a decrease in the digestion of nutrients (mainly
fat and some amino acids). Reduction in feed intake represents 68 percent of decreased growth due to E. coli.
Besides the indisputable immunoregulators (e.g., vitamin E), we also find non-essential phytonutrients that can
The effect of a flavonoid-rich phytonutrient product
on piglets was investigated in a recent study. One result
was an increased villus height to crypt depth ratio in
the small intestine due to feeding. The research group
assumed that an increased villus height leads to an improvement in the digestive and absorptive functions of
the intestine, which seems to be caused by an increased
absorptive surface, expression of brush border enzymes
and nutrient transport systems. They concluded that
oral administration of a polyphenol-rich phytonutrient
suppresses the activity of NF-κB in the small intestine
of pigs. This may provide a useful dietary strategy to
inhibit inflammation in the gut. Other research gives
reason to believe that similar effects can be assumed in
chickens as well as aquatic species.
A further issue besides that of feed intake and diges-
May 2018 ❙ www.WATTAgNet.com
tive inefficiencies is the effect on nutrient digestibility.
Research has shown the interesting effect on ileal digestibility of select nutrients after intravenously infecting
broiler chicks with E. coli. In summary, the results seem
to show that methionine, lipid, retinol, lutein, calcium
and iron digestibility in particular are negatively affected.
Digestibility is decreased by up to 37 percent.
Elements of antibiotic-free
Source: Dr. Eckel Animal Nutrition
There is no silver bullet for antibiotic elimination
in animal feed; instead, it requires efforts on