THE FOLLOWING IS A PARTIAL POST FROM ONE OF MY GOLDEN RETRIEVER FORUMS. LIKE HER, I HAVE NEVER USED ORIJEN FOOD AND DO NOT KNOW MUCH ABOUT IT, HAD NEVER HEARD OF ZEA MAYS. I DID CHECK AND SHE IS CORRECT, IT IS CORN. AS SHE SAID, THERE IS APPARENTLY VERY, VERY LITTLE IN THE FOOD, BUT IF YOUR DOG IS HIGHLY ALLERGIC TO CORN, IT COULD BE ENOUGHT TO SET OFF A REACTION, AND ONE PERSON REPLIED ANY AMOUNT SETS OFF REACTION IN HER DOG. SO, THOUGHT I WOULD PASS THIS ALONG IN CASE ANY OF YOU HAVE A DOG HIGHLY ALLERGIC TO CORN AND ARE CONSIDERING THIS FOOD. ALSO, IT APPEAS IF YOU ARE GRAIN FREE, YOU BEST HECK OUT STRANGE NAMES LIKE THIS TO SEE EXACTLY WHAT IT IS.
Deboned chicken, chicken meal, turkey meal, russet potato, lake whitefish, chicken fat, sweet potato, whole eggs, turkey, salmon meal, salmon and anchovy oils, salmon, natural chicken flavour, sunflower oil, sun-cured alfalfa, dried brown kelp, carrots, spinach, peas, tomatoes, apples, psyllium, dulse, glucosamine Hcl, cranberries, black currants, rosemary extract, chondroitin sulfate, sea salt.
TONIC HERBS AND BOTANICALS
Chicory root, licorice root, tumeric root, funugreek, marigold flowers, sweet fennel, zea mays, peppermint leaf, chamomile flowers, dandelion, summer savory, rosehips.
ORGANIC MINERALS
Iron proteinate, zinc proteinate, manganese proteinate, copper proteinate.
PROBIOTIC MICROORGANISMS
Dried Lactobacillus acidophilus fermentation product, dried Enterococcus faecium fermentation product.
What is Zea Mays???Synonoms = Corn, Maize!!!
Obviously it's probably not in any great amount in the food but needless to say I was shocked! 
I don't personally feed Orijen but I thought I'd post this for those who do or are considering it just as an fyi.