The invention provides an animal feed composition comprising plant material from a transgenic plant or plant part expressing a recombinant thermotolerant α-amylase. The invention further provides methods of improving feed utilization and decreasing liver abscesses. Also provided are methods of producing a steam flaked corn product, and the steam flaked corn product so produced.The invention provides an animal feed composition comprising plant material from a transgenic plant or plant part expressing a recombinant thermotolerant α-amylase. The invention further provides methods of improving feed utilization and decreasing liver abscesses. Also provided are methods of producing a steam flaked corn product, and the steam flaked corn product so produced.