As a dog trainer and expert, I consider Orijen Puppy Large dog food to be one of the best commercial dog food for mastiffs and mastiff mixed dogs. There are many aspects that set Orijen apart from its competitors. First of all, Orijen is a reputable manufacturer and their ingredients for dog foods come from locals that they trust. Secondly, I recommend for you to get this dog food because it is grain free. Grain free is important because dogs are meant to be mostly carnivores and they ate fresh meats for thousands of years in the wild. Grain free dog food will eliminate all allergies your dog may be prone to such as being allergic to gluten, which results in hair loss.
Orijen Puppy Large
Orijen Puppy Large is the dog food made specifically for Mastiff dogs and other large breeds. I have 
been successfully feeding my Cane Corso puppy with this dog food with great results. Orijen Puppy Large closely identifies with fresh foods that dogs are meant to eat such as chicken, turkey, herring and salmon. The contents of Orijen Puppy Large contain 80% meat, 20% veggies and fruits and it is grain free. Many cheap dog food manufacturers make their foods at high temperatures causing all the nutrients in the foods to disappear. Orijen Puppy Large or Orijen for mastiff puppies, are slow cooked at low temperatures thus keeping their natural nutrients.
Ingredients list for Orijen Puppy Large (directly from orijen.ca)
Fresh boneless chicken*, chicken meal, fresh boneless salmon*, turkey meal, herring meal, russet potato, sweet potato, peas, fresh boneless turkey*, chicken fat, (preserved with mixed tocopherols), fresh whole eggs*, fresh chicken liver*, fresh boneless lake whitefish* fresh boneless walleye*, sun-cured alfalfa, pea fiber, fresh boneless herring*, organic kelp, pumpkin, chicory root, carrots, spinach, turnip greens, apples, cranberries, blueberries, licorice root, angelica root, fenugreek, marigold flowers, sweet fennel, peppermint leaf, chamomile, dandelion, summer savory, rosemary, vitamin A, vitamin D3, vitamin E, niacin, thiamine mononitrate, riboflavin, d-calcium pantothenate, pyridoxine, folic acid, biotin, vitamin B12, zinc proteinate, iron proteinate, manganese proteinate, copper proteinate, selenium yeast, Lactobacillus acidophilus, Enterococcus faecium. *
Dog food is usually categorized through 1-6 starts according to their quality. Oreijn belong in the 6 start category for dog food. You pay for quality, Orejin puppy large costs $69.99 for a 30 pound bag but you can be guaranteed it contains the freshest of ingredients. Dog lovers all over the world is rating puppy large to be of the highest quality in its class. You can read some of these reviews taken directly from amazon. Here is what people are saying about Orijen for mastiff and other large breeds!
Orijen works out of their base in Canada supplying this quality food to all over the world. Their food is packed with nutrients you can tell that from the following first 6 ingredients in this dog food fresh deboned chicken, chicken meal, turkey meal, russet potato, fresh deboned pacific salmon, herring meal and good carbs. The salmon content in the dog food will provide your Mastiff dog with a natural source of DHA and EPA to protect your dog’s heart, skin and coat.
I have been an Orijen customer for a year and I can safely say that their products especially the Puppy Large is a balanced and nutrient filled diet for your large breed dog. I also feed this dog food to my American Pit Bull Terrier with great results. My Pit Bull, since she is a medium sized dog so I can cut down the feeding time to 2 times a day with this food. She is vibrant and has a beautiful and shiny coat. Best of all, my Pit Bull doesn’t poop all over the place like she used to with some other brands of foods that I used to feed her.
