Effect of Crude Protein and Fat in the Diet on Performance and Egg Quality of Brown Egg-Laying Hens with Different Initial Bodyweights
As protein and fat levels did not affect egg production in this Spanish trial, the researchers concluded that brown egg-laying hens do not require more than 16.5 per cent crude protein in the diet. The heavier hens produced more larger eggs than lighter birds but feed efficiency per kilogram of eggs produced was not significantly different.