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

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25-lb bag
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  • 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
  • Brand
    Natural Ultramix
  • Breed Size
    All Breeds, Small, Medium, Large
  • Food Form
    Dry Food
  • Lifestage
  • Made in
    United States
  • Special Diet
    Sensitive Digestion, Grain-Free, No Corn No Wheat No Soy

Nutritional Info


  1. 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

  1. 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 (Cups)
3-12 lbs 1/2 - 1 cup
13-25 lbs 1 1/4 - 1 3/4 cups
26-50 lbs 2 - 3 cups
51-100 lbs 3 - 4 1/2 cups
100-150 lbs 4 1/2 - 6 cups
  • Add ½ 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 to 10 days, gradually increasing the amount of Natural Ultramix while decreasing the amount of your dog’s current diet.

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Customer Reviews

Castor & Pollux Natural Ultramix Salmon Grain-Free & Poultry-Free Adult Dry Dog Food is rated 4.9 out of 5 by 126.
Rated 5 out of 5 by from American Bulldog Review Hi, Brogue here - I am a 1 year American Bulldog and I absolutely love this food! My allergies to food or so what I thought was from food, started when I was a pup. My tummy would break out in red itchy patches and hives. My mom couldn't figure out what was wrong. The vet said it was most likely because I was running and playing in the grass and had what she called "environmental" allergies. When I went potty, it wasn't good on top of it! I ate the "vet" food and it was OK, but I really didn't love it. After trying many different kibble, my mom found this one after lots of hours spent researching on the computer. Salmon is my favorite cause my skin does much better with it. So, mom bought me this food. I have been so happy and energetic! My skin is not so itchy and I have't had a rash in a long time! My parents are really happy too! They tell me how good I am when I finish an entire bowl of it. You should try this food for your dog!
Date published: 2016-10-27
Rated 5 out of 5 by from Yay real food!!!! My dogs think this food is awesome and so do I :) my boxers are prone to gas and after successfully switching we have no gas!!!!! Which is a miracle!!!! I love the real pieces of dried fruits and veggies in it. The kibble is heart shaped so i think that is cute too. Bella thinks the pieces of dried food are treats and loves them. I rotate kibble brands/flavors and im so glad to stumble onto this food. My girl cant have grains or poultry so this is perfect. I know other reviews said its really fishy smelling but i dont notice that. My husband is really senstive to the fish smell of dog foods and he hasnt even noticed we did a food change to fish yet :) and he can always tell!!! Id love to also try the duck flavor. Im a little nervous since one of my dogs cant do chicken i wonder if duck would affect them... either way im really glad to have found this food. I think we will stick with this one for a while!!! Chewy rocks as always. Love the added visuals with the videos for all the dog foods!!!! Go chewy!!! Your awesome.
Date published: 2016-10-08
Rated 5 out of 5 by from Looks like doggie trail mix. A real treat for pups! I've never seen my dog eat his food so fast. He absolutely loves the Ultramix. I used to give him the C&P Salmon, sweet potato, and pea mix that only had the dried kibbles, but when I was placing my last order I decided to switch it up and try the Ultramix. I love that this mix has dried fruit and veggies along with the kibbles. My dog normally likes veggies like steamed carrots and green beans, but I could never get him to eat fruit. He goes wild over the dried banana pieces in the Ultramix. I have even started substituting the banana chips from the food in place of his daily treats. I will definitely be ordering this again!
Date published: 2016-12-27
Rated 5 out of 5 by from Only food my dog can eat. I have a 9 month old silver Labrador that was born allergic to everything. I don't remember him having a solid stool until I found this Ultramix that is grain free and poultry free. He would break out in skin rashes with every other type of food we purchased which ended up costing me in the four figures in vet bills and prescriptions to eliminate. I even tried boiling chicken breasts and adding rice which yielded the same outcome. This food was a savior. He is a good sized lab at 85 lbs and all muscle. I give him 3 cups in the morning and 3 cups at night and he has a great shape to him along with great energy to maintain. This feeding schedule takes me through two 15 lb bags a month so I have now set up autoship and saving over $9 a shipment. If you have a dog that seems allergic to grains and poultry then I would highly recommend you try this Castor & Pollux Natural Ultramix Salmon. It has allowed my family and Dude to enjoy our relationship everyday.
Date published: 2013-11-23
Rated 5 out of 5 by from Our dogs love it. I have two Morkies that love this dog food. They never turn their nose up when they get this brand. We have been using this brand for over 6 years.
Date published: 2017-03-10
Rated 5 out of 5 by from Great food! I am extremely pleased with this food. I first heard about Castor & Pollux when Merrick (our usual kibble) bought them several years ago. Merrick is a great company with no kibble recalls and all USA, so I knew I could trust C&P too. I wanted my dogs on a fish based kibble for the winter to help keep their skin from drying. One of my dogs is picky and did not like Merricks salmon formula (this does have salmon, but also a fair amount of other fish as well). I also needed a kibble with no chicken due to an intolerance with one of my dogs. This fit all of my requirements so we gave it a try. I cannot be more pleased! Everyone gobbled it up without hesitation. I will definitely purchase this again! The kibble was about average size and in the shape of hearts-not kidding! It also had small pieces of dried fruit and veggies, which was visually appealing, and the dogs ate them with no issues.
Date published: 2015-03-22
Rated 5 out of 5 by from Highly Recommended Pet Food I sought out a grain-free, poultry-free food after struggling to find some allergy-relief for my dog, Fred. He is 10 years old and, with a recent move to Texas, was overwhelmed by allergies. Our vet had tried multiple medications, etc. with no affect. A friend recommended we switch his food so I took a chance and order this Castor & Pollux bag. It has made a huge difference for my dog! He seems the happiest and most energized he has been in a long time. His allergy-related symptoms are minimal at most. Clearly, this diet switch was essential for his health. Though it might not work for all, I highly recommend this food. It not only helps Fred health-wise, but he loves eating it. There are some very small vegetable chunks in the food which he sometimes does not digest but that does not concern me. From one pet owner to the other, I'll say it again, I highly recommend this dog food.
Date published: 2016-06-13
Rated 5 out of 5 by from This company and their food was recommended to me by a veterinarian and by a friend! My Corgi loves the taste and I love the benefits! After reading the label and seeing the ingredients, I decided to put my Corgi on OrganX. She is not a fussy eater at all, so flavors, gravies,and everything else the competitors use to entice owners and dogs to buy their food, doesn't matter. But what did matter was how her coat looks, how she healed from injuries, how much energy she has,and how healthy her food is! I do believe she eats better than I do!
Date published: 2017-01-24
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