Castor & Pollux Natural Ultramix Salmon Grain-Free & Poultry-Free Adult Dry Dog Food

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5.5-lb bag
  • 5.5-lb bag
  • 15-lb bag
  • 25-lb bag
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This recipe is ideal for active adult dogs (all breeds, all sizes) through their golden years. This grain-free & poultry-free recipe uses salmon as the primary ingredient, followed by other fish-based protein sources for optimal nutrition and great taste. Real pieces of minimally processed fruits and vegetables provide a natural source of antioxidants, vitamins, and fiber that you can actually see in the bag. And there are plenty of other powerful benefits that aren’t visible to the eye, including Omega 3 and 6 Fatty Acids that contribute to healthy skin and a luxurious coat, and a balanced calcium to phosphorous ratio that helps promote healthy bones and teeth. Natural Ultramix Grain-Free & Poultry-Free Adult Dog Food is made without artificial colors and preservatives, grains, or poultry.

Key Benefits

  • Natural salmon is the #1 ingredient, and then bolstered with other fish based protein sources
  • Provides a highly digestible, balanced diet great for dogs with sensitivities to poultry or grains
  • Omega 3 and 6 fatty acids contribute to healthy skin and luxurious coat, and calcium and phosphorus ratio helps support healthy bones and teeth
  • Include minimally processed fruits and vegetables that provide a source of antioxidants and vitamins
  • Made without corn, wheat, soy, artificial colors or preservatives with probiotics to support digestion

See all items by Castor & Pollux

  • Item Number
  • Weight
    5.5 pounds
  • Brand
    Natural Ultramix
  • Breed Size
    All Breeds, Small Breeds, Medium Breeds, Large Breeds
  • Food Form
    Dry Food
  • Lifestage
  • Made in
    United States
  • Special Diet
    Sensitive Digestion, Grain-Free, No Corn No Wheat No Soy

Nutritional Info


Salmon, Salmon Meal, Herring Meal, Menhaden Fish Meal, Dried Peas, Dried Potato, Tapioca Starch, Canola Oil (Preserved with Mixed Tocopherols and Citric Acid), Pea Protein Concentrate, Tomato Pomace, Dried Bananas, Natural Salmon Flavor, Ground Whole Flaxseed, Brewers Dried Yeast, Dried Carrots, Monocalcium Phosphate, Salt, Freeze Dried Peas, Potassium Chloride, Dicalcium Phosphate, Dried Cranberries, Dried Sweet Potatoes, Fructooligosaccharide, Vitamins (Vitamin E Supplement, L-Ascorbyl-2 Polyphosphate, Vitamin A Supplement, Calcium Pantothenate, Niacin, Riboflavin, Vitamin B12 Supplement, Biotin, Thiamine Mononitrate, Pyridoxine Hydrochloride, Folic Acid, Vitamin D3 Supplement), Minerals (Zinc Proteinate, Iron Proteinate, Copper Proteinate, Manganese Proteinate, Calcium Iodate, Sodium Selenite), Choline Chloride, Rosemary Extract.

Caloric Content

3,524 kcal/kg, 375.2 kcal/cup

Guaranteed Analysis
Crude Protein 30.0% min
Crude Fat 15.0% min
Crude Fiber 4.5% max
Moisture 10.0% max
Calcium 1.2% min
Phosphorus 1.0% min
Vitamin E 75 IU/kg min
Omega-6 Fatty Acid 2.25% min
Omega-3 Fatty Acid 1.75% min

Feeding Instructions

Weight Daily Feeding (cup)
3 - 12 lbs 1/2 - 1 cup
13 - 25 lbs 1 1/4 - 1 3/4
26 - 50 lbs 2 - 3
51 - 100 lbs 3 - 4 1/2
100 - 150 lbs 4 1/2 - 6
  • Add 1/2 cup for every 25 lbs of body weight over 150 lbs.

This formula is not intended as the sole diet for growing puppies, pregnant or lactating dogs - these dogs have special nutritional needs that require a different balance of protein, calories, and other nutrients. Help your dog maintain good body condition by monitoring food intake, providing exercise and visiting your veterinarian on a regular basis. Please adjust your dog’s feeding amount using the chart as a guide. The amount will vary by age, activity level, environment and breed. Always have a clean bowl of fresh water available for your dog.

Transition Instructions

To help your dog adjust to a new diet, we recommend a gradual change. Slowly introduce Natural Ultramix by mixing it in with the current food over the course of 7 - 10 days, gradually increasing the amount of Natural Ultramix while decreasing the amount of your dog’s current diet.

Naturally Complete Pet Nutrition

Natural Ultramix makes it easier than ever for pet parents to feed their dogs a high-quality, balanced diet with everything they need to keep them healthy. Each recipe is prepared with the help of animal nutritionists and veterinarians, and all the ingredients are supplied by trusted sources. They've done all the work to provide you plenty of flavorful and nutritious formulas to choose from.

Naturally Complete Pet Nutrition
The Goodness Is In The Mix

The Goodness Is In The Mix

Castor & Pollux believes wholesome, balanced nutrition is at the core of good pet food. Their Natural Ultramix dog food demonstrates their commitment to this philosophy by creating the perfect mix for each recipe. The right blend of proteins, omega fatty acids, fruits, vegetables, vitamins and minerals helps provide your canine companion with everything they need to live their best life—it's nutrition you can actually see. Their Natural Ultramix dry and wet foods do not contain any corn, wheat, soy, artificial colors or preservatives and come in a variety of formulas, so you can find the perfect match for your pup.

Tested for Safety and Quality

To make sure they always provide premium dog food of the highest standard, Natural Ultramix goes above and beyond when it comes to safety checks. They not only test inbound ingredients, but they also perform tests during production and on the final product, too. So you can be sure you're feeding exactly what the bag promises—safe, natural nutrition.

Tested for Safety and Quality
Castor & Pollux

About Castor & Pollux

Natural Ultramix is made by Castor & Pollux, a company that's run by a team of experts in animal nutrition, organic and natural ingredients, and veterinary medicine. They're driven by a desire to give pet parents healthy, safe and nutritionally beneficial choices for feeding their furry family members. What began as two pet parents who wanted to provide the best food for their rescue puppy has evolved into an industry leader that sets new standards with purposeful pet food.

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Customer Reviews

166 reviews 166 Reviews 4.9 out of 5 Stars

98% Recommend

98% of reviewersrecommend this product

4.9 / 5

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  • Excellent choice

    By on

    I have been purchasing this product for quite a while, dogs happy and thus I am happy! However, the flavor for which is on auto-ship, was out of stock (never before happened) and this flavor was instead suggested. The dogs took a few days to adjust and I was just happy they did NOT experience digestive issues! So, if you are on auto-ship. I suggest you double check PRIOR to needing! I assumed the item would ship as usual but a day or two prior to shipping I received an alert stating the item was out of stock and I could not be told when the item would be in stock thus having to make a quick decision about a replacement. It's best to check before as to avoid such a situation.

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  • Perfect fit for budget and diet!

    By on

    We have been searching for a grain and chicken free dog food for along time. Our dog has developed some allergies later and life was taking it rough. All dog foods seemed to have some type of chicken meal or fat in ingredients. This is an affordable healthy option and our dog has a while new lease on life! She seems 5 years younger!

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  • This is a great food

    By on Top 500 Contributor

    My female was apparently allergic to the "4 star" quality foods I had tried. Since I mixed the ultramix foods together she is doing great. It is fun to see the dried bits of vegetables mixed with the food. Other foods may tell you there are vegetables in their food, with the ultramix you can actually see the vegetables.

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  • Dog prefers Duck

    By on

    Purchased the salmon because you’re currently out of duck. Only giving this a four rating because I just don’t like the smell of the food versus the duck. Dog loves this brand and so do I. Won’t buy anything else. Please let me know when duck is back in stock....thank you !!

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  • love this food

    By on

    We really like this dog food but have not been able to get for a month or two. makes it very difficult when that is what your dogs are use too Very good dog food when is it going to be in,, heard chewy was bought out not as happy with them as i use to be. i used to tell everyone about chewy I have like 10 friends who now use them

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  • Healthy, happy dogs!

    By on

    We have been feeding our five dogs Castor and Pollux food for for years now and could not be happier. Our five dogs are very healthy and all have shiny coats. It can be hard to find it in retail stores, so we were very happy to find it on Chewy.

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  • Love it, but...

    By on

    I love this dog food for my Jindo. This is the only thing that doesn't make him sick. I just wish it wasn't so hard to find and I could get larger bags. I have 3 dogs to feed and all these little bags everywhere don't make things easy for me.

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  • Skin and coat.

    By on

    I bought this to help with Gladys's lack lust coat and her shedding. I mix with the Wilderness food and she gobbles it up. Only been feeding for two weeks so it's a wait and see if any improvement. Any feedback???

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  • Castor & Pollux Natural Ultramix

    By on

    All types of Castor & Pollux Natural Ultramix for dogs is amazing. I switched over to the brand a year ago, and it is has made a significant difference in my dogs' health, especially the dog that had a food intolerance. His reflux is gone after years of treatment for it. Definitely a very high quality food. I highly recommend it.

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  • Doggie Diner

    By on

    My dogs are not picky eaters, but both have allergies. I have two dachshunds, 9 and 10 years old. This grain and poultry free food has worked wonders on their skin and overall health. Super fast shipping too!

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