In this research, average feed intake for hens fed 15 or
17 g of protein/d was approximately 93 g. That amount
is similar to feed intake reported for a commercial layer
operation (Yang et al., 2000). From that research, average
CP of the diet was 15.6%, average egg production
was 70.1%, and average egg output was 42.8 g/d. Experiments
that have examined ways to improve nitrogen
utilization have had average feed intakes of 115 g
(Summers, 1993) and 140 g (Blair et al., 1999) per hen