. Albumen
weight, percentage albumen weight, and albumen: yolk
were higher and percentage yolk weight was lower in
D compared with WSD treatment (P = 0.043, P =
0.027, P = 0.024, and P = 0.041, respectively). Number
of blood spots was higher in E than M treatment
(P = 0.053). In conclusion, use of a wedge-shaped disc
mill resulted in higher ATD for phosphorus, manganese,
and copper than use of a disc mill; however, digestibility
for majority of minerals as well as egg quality parameters
was comparable. Therefore, feed produced by
either disc mill or wedge-shaped disc mill as mash or expandate
may be used for laying hens without negative
effects on egg quality