Castor & Pollux Natural Ultramix Grain-Free Duck, Sweet Potatoes & Peas Entree Adult Dry Dog Food

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25-lb bag
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Now you can provide some much needed variety in your dog’s diet without sacrificing healthy nutrition. Natural Ultramix Grain-Free Duck, Sweet Potatoes & Whole Peas Entree Dry Dog Food features all-natural duck protein, plus wholesome sweet potatoes and whole peas with essential nutrients. It’s even grain-free - ideal for dogs sensitive to grains.

Key Benefits

  • First ingredient is natural deboned duck, with real pieces of fruits and vegetables to help maintain a healthy digestive system
  • Contains probiotics to help support digestion and rich in antioxidants and essential fatty acids
  • Great for dogs sensitive to grains, while still craving the taste and getting the nutrients your dog needs
  • Tested throughout the production process to ensure quality and safety with no artificial colors, flavors or preservatives
  • Calcium and Phosphorus ratio helps support healthy bones and teeth

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. Deboned Duck, Turkey Meal, Lamb Meal, Salmon Meal (Source of Omega 3 Fatty Acids), Sweet Potato, Peas, Potato, Duck Fat (Preserved with Mixed Tocopherols), Potato Protein, Pea Protein, Natural Flavor, Bananas, Carrots, Apples, Cranberries, Blueberries, Organic Alfalfa, Salmon Oil, Minerals (Salt, Zinc Amino Acid Complex, Zinc Sulfate, Iron Amino Acid Complex, Manganese Amino Acid Complex, Copper Amino Acid Complex, Potassium Iodide, Cobalt Amino Acid Complex, Sodium Selenite), Vitamins (Choline Chloride, Vitamin E Supplement, Vitamin A Supplement, Vitamin B12 Supplement, D-Calcium Pantothenate, Vitamin D3, Niacin, Riboflavin Supplement, Biotin, Pyridoxine Hydrochloride, Folic Acid, Thiamine Mononitrate), Dried Chicory Root, Yucca Schidigera Extract, Dried Lactobacillus Plantarum Fermentation Product, Dried Lactobacillus Casei Fermentation Product, Dried Enterococcus Faecium Fermentation Product, Dried Lactobacillus Acidophilus Fermentation Product, Rosemary Extract.

Caloric Content

  1. 3,740 kcal/kg, 460 kcal/cup
Guaranteed Analysis
Crude Protein 38.0% min
Crude Fat 17.0% min
Crude Fiber 3.5% max
Moisture 11.0% max
Calcium 1.0% min
Phosphorus 0.8% min
Vitamin E 50 IU/kg min
Glucosamine 1,200 mg/kg min
Chondroitin Sulfate 1,200 mg/kg min
Omega 6 Fatty Acid 4.5% min
Omega 3 Fatty Acid 0.4% min

Feeding Instructions

Weight Daily Feeding (Cups)
3 lbs 1/3
6 lbs 1/2
10 lbs 3/4
15 lbs 1
20 lbs 1 1/3
30 lbs 1 3/4
40 lbs 2
50 lbs 2 1/2
60 lbs 3
70 lbs 3 1/2
80 lbs 3 3/4
90 lbs 4
100 lbs 4 1/4

Every dog is a little different, so optimal feeding amounts may vary with age, size, and activity level. Please use the information adjust when needed. If feeding with wet food, reduce dry amount by ½ cup for every 6 oz of wet food.

  • For dogs over 100 lbs: Add ¼ cup per additional 10 lbs.

Transition Instructions

Gradually mix in the new food over a 5-7 day period, increasing the amount of Natural Ultramix each day.

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Customer Reviews

Castor & Pollux Natural Ultramix Grain-Free Duck, Sweet Potatoes & Peas Entree Adult Dry Dog Food is rated 4.8 out of 5 by 99.
Rated 5 out of 5 by from American Staffordshire Terriers Love This Food After much research I changed to this, "Grain Free" food. Both dogs have very shiny coats and no allergy problems what so ever. Since the real meat in this food is duck, I know from eating duck myself that it is quite greasy. So my dogs really benefit with high gloss coats because of the duck. My dogs absolutely love this food and dive into it when I put it in their bowls. I used other 5 star dog foods but they didn aide in producing such incredible shiney, high gloss coats as this food. Plus they actually dive into this food like their is no tomorrow. That never happened with the other foods. My dogs are not overweight and look fabulous! Stools at first were a bit loose when changing over to this food, but that is a normal acurance in the digestive system. Now, they are firm and the dogs have great energy and stamina. Excellent food for my, "Amstaffs." My pictures attached do not capture the real-life super gloss sheen but I did my best to show everyone.
Date published: 2014-10-28
Rated 5 out of 5 by from Great Food for Sensitive Tummies We struggled for well over a year trying to get our boxer/bearded collie mix's sensitive stomach issues under control. We tried everything from limited ingredient and even veterinarian diets. We finally found a diet that worked that had duck as the main protein and was limited ingredients. Unfortunately the food was discontinued. That's when we tried out Castor and Pullox Duck and Sweet Potato. Our dog loves this food and it doesn't upset his stomach at all! I also love that you can see the real pieces of fruits and veggies! We joke that our boy Nash eats better than us now! We were buying this from the pet store since my husband worked for the pet store chain and got a discount, but they actually raised the prices on it and even with my husband's discount Chewy now sells it for less. So thanks Chewy for your amazing prices and great service!
Date published: 2017-01-13
Rated 5 out of 5 by from Good quality and highly rated by Dog Food Advisor This is the first dog food that one of my dogs can truly tolerate and actually enjoys eating. He has had problems for years with finicky eating, vomiting and reflux. I tried different foods, until I accidentally came upon Castor & Pollux Grain Free Duck, Sweet Potatoes and Peas. What a difference it has made for him! He has gained some weight and actually enjoys eating it. He has not had any vomiting or reflux since being on this food for about 4 months. I have now begun feeding it to my other dog as well.
Date published: 2017-03-02
Rated 5 out of 5 by from Excellent quality dog food. Chewy is the best company to do business with. They offer great products and I get my order the next day. It's so much easier than going to a pet store and lugging a 25 lb bag of dog food. Chewy is great. Joan F
Date published: 2017-01-12
Rated 5 out of 5 by from Digs love it! My dogs love this food! I can't keep my dog out of the food bag.
Date published: 2016-12-23
Rated 5 out of 5 by from So far, so good It has only been a short time since we introduced Castor & Pollux Natural Ultramix Grain-Free Duck, Sweet Potatoes & Peas Entree Adult Dry Dog Food to our almost 5 year old Teddy Bear. So at this point we are still increasing the amount of the new food along with his current food gradually. He seems to like it a lot so that is all good as he can be a picky eater. What we are hoping to see as we make the complete switch is some relief for him from the itchiness that has long been an issue for him. I was very impressed with the list of ingredients and the price was good too.
Date published: 2017-02-17
Rated 5 out of 5 by from HIGHLY RECOMMEND! I have six rescue dogs (Amstaffs, Pit, Shar-Pei mix, Corgi-Doxi mix, Rat Terrier mix) and they vary in age (2 to 10+). They all LOVE this food and appear to be thriving. The latest blood work (during dentals) for the older gals and boy came back as excellent. The C&P packaging keeps this food fresh! It has all the nutrients I believe are important to maintain excellent health and, it's grain free. There's been so much talk regarding arsenic levels in rice, I'm now afraid to use any recipe containing rice. This particular Duck formula appears to be the very best, most affordable choice to meet our needs! My only complaint is that the price for a 30 lb bag has increased $5. It's still the most nutritious food I can find under $2 a pound and, as I said, they ALL absolutely LOVE the C&P grain free Duck recipe. It can be very difficult to find in stores. So, I'm on the auto-ship program because Chewy still does have the best price, guaranteed availability, free shipping and excellent customer service! I honestly don't know what more I could possibly ask for..... ;-)
Date published: 2014-02-27
Rated 5 out of 5 by from Dog With Digestion Problems I cooked for my dog for years as dog food really caused issues with his stomach. I noticed as he was getting older (5) he was slowing down. I decided I couldn't give him everything he needs in home cooked food as he matures. The search was on. Everything gave him diarrhea or he was throwing up. Some he just refused to eat. I transitioned him to this food (using pumpkin) and so far no issues! Stools are getting better, no throwing up and best of all he loves it! It has good quality ingredients, made in the USA and no recalls! Couldn't be happier!
Date published: 2016-12-14
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