1289817 Poultry feeds F HOFFMAN LA ROCHE & CO AG 20 Jan 1970 [29 Jan 1969] 2708/70 Heading A2B A poultry feed comprises citranaxonthin and one or more yellow pigmenting carotenoids. Suitable carotenoids are zeaxonthin, #-apo-8'-carotenal (C 30 ) and #-apo-8'-carotenoic acid (C 30 ) ethyl ester. The feed is utilised to increase the pigmentation of poultry egg yolk.
