An animal food composition comprising a protein source and corn starch, wherein native high-amylose corn starch comprises at least 50% of the corn starch. The composition can be used to treat or prevent a food allergy in an animal. Also, a process for the preparation of an animal food composition comprising mixing a protein source, corn starch and water to form a mixture and heating the mixture; wherein native high-amylose corn starch comprises at least 50% of the corn starch.