Evaluation of Hempseed (Cannabis sativa L.) Presscake and Oil on Production Performance, Amelioration of Fatty Liver Disease, and Feather Pecking in Laying Hens (Gallus gallus domesticus)

Abstract

As the Canadian poultry industry transitions to alternative housing systems by 2036, larger group sizes may increase feather pecking (FP), leading to mortality, and reduced egg production. Hempseeds are rich in protein and fatty acids, which may support egg production and feather growth, and the CBD may provide a calming effect. Hemp’s antioxidant and anti-inflammatory properties may reduce fatty liver disease (FLD), a prominent cause of mortality in cage systems. Two 14-week studies tested hempseed presscake (HP at 10, 20%) and hempseed oil (HO at 3 and 6%) as feed ingredients in laying hen diets. Study 1 involved Lohmann LSL-Lite White and Lohmann Brown-Lite hens in conventional housing; study 2 used Lohmann LSL-Lite White in a single-tier system. Results showed that hemp products improved egg quality, bone strength, and feather condition, with potential benefits for FLD. Findings support hemp's inclusion in poultry diets, with applications under review for CFIA approval.