The present invention relates to an animal feed composition comprising one or more grains in an amount totaling 48-70% w/w of the composition a non-algal protein source in an amount totaling 15-30% w/w of the composition algae in an amount totaling 3-15% w/w of the composition an exogenous protease totaling 0.01-0.1% w/w of the composition and an oil heterologous to the algae in an amount totaling 0.5-15% w/w of the composition. The present invention also relates to an animal feed supplement, methods of feeding an animal, methods of improving the feed efficiency of an animal, and an improvement to an animal feed.
