A negative correlation was observed between efficiency of a screw press and the moisture of flaxseed. The flax cultivars varied in lipid composition, with ACEmerson having higher α-linolenic acid content than Nolin. The low yield of flaxseed was improved by drying or by washing and drying. Eggs produced by hens fed on feed supplemented with flaxseed cake showed increased n-3 fatty acids and decreased ratio of n-6/n-3 fatty acids, with increasing addition ratio of residual flaxseed cake.