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

  • Price:

    $59.62 FREE 1-2 Day Shipping on this item

Temporarily out of stock
25-lb bag
  • 5.5-lb bag
  • 15-lb bag
  • 25-lb bag
Sorry, this item is temporarily unavailable


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
    25.0 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.

Pet Lovers Also Bought

Customer Reviews

163 reviews 163 Reviews 4.9 out of 5 Stars

98% Recommend

98% of reviewersrecommend this product

4.9 / 5

You've Already Reviewed This Item

Showing 1-10 of 163 Reviews

Sort by:
Filter by:
  • 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.

    You liked it! Something went wrong. Please try again later. Report
  • 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!

    You liked it! Something went wrong. Please try again later. Report
  • 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.

    You liked it! Something went wrong. Please try again later. Report
  • My Picky Dogs LOVE It!

    By on

    Just switched over from Acana, my picky dogs were gaining weight on the other, too much protein, so now they LOVE this new food and I do too! I also bought the chicken flavored food, but haven't gotten around to trying that one yet. I stir in a little bit of salmon or tuna (canned) and they just love this. I like that it has real freeze dried fruit and vegetables that I can really see!

    You liked it! Something went wrong. Please try again later. Report
  • 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 !!

    You liked it! Something went wrong. Please try again later. Report
  • 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.

    You liked it! Something went wrong. Please try again later. Report
  • 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???

    You liked it! Something went wrong. Please try again later. Report
  • 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.

    You liked it! Something went wrong. Please try again later. Report
  • So far so good!

    By on

    My dog is the pickiest eater, he is such a diva with food, but this food so far has been the easiest food to get him to eat! He sometimes still won't eat, but for how many foods I've tried, this is the best

    You liked it! Something went wrong. Please try again later. Report
  • Stanley loves it!

    By on

    My poor dog Stanley has had a skin infection and been on antibiotics during the summer. I tried this food after finding a good rating on Dog Food Advisor site and since it was salmon I thought it might help his skin and fur. He really seems to love the food. And his coat is much softer, probably because of the salmon and other added ingredients I have been putting in his food.

    You liked it! Something went wrong. Please try again later. Report