A trial was conducted with the Centre for Applied Research in Avian Nutrition (CIANA), Mexico (2021), to determine the effect of supplementing OSP on the productivity of commercial laying hens after 43 weeks of age. 320 Lohmann Lite hens at 43 weeks of age were randomly assigned to one of two groups, each with 8 replicates of 20 hens: control (basal diet only) or OSP (basal diet + 300g/t OSP), for a 15-week trial period. Hens were housed in a natural environment in California type cages in a pyramidal shape of two levels, with 5 birds per cage.
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