The weight of the proventriculus varied quadratically
with the concentration of the EEP supplement at
7 days, and the quadratic equation predicted a lower
weight for animals fed at an EEP level of 2865 ppm
(Table 3, p < 0.05). The weights of the other organs
evaluated did not vary with the EEP level at either 7
or 21 days of age (p > 0.05).
At 7 days of age, the intestinal morphology did not
differ among the experimental groups (p > 0.05). For
the duodenum at 21 days, the crypt depth and the
ratio of the villus height to crypt depth varied quadratically
with the level of the EEP supplementation; the
quadratic equation predicted a lower crypt depth in
broilers fed diets supplemented with 2943 ppm of the
EEP and a higher villus-to-crypt ratio when diets were
supplemented with 3047 ppm of the EEP (Table 4,
p < 0.05). The treatments had no effect (p > 0.05) on