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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  • 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
  • Weight
    25.0 pounds
  • 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. 3,524 kcal/kg, 375.2 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

Rated 4.8 out of 5 by 91 reviewers.
Rated 5 out of 5 by 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! January 13, 2017
Rated 5 out of 5 by 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 January 11, 2017
Rated 5 out of 5 by 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! December 14, 2016
Rated 5 out of 5 by Digs love it! My dogs love this food! I can't keep my dog out of the food bag. December 23, 2016
Rated 5 out of 5 by Excellent ingredients I looked for the best food for Sugar that I could afford. I knew I d find it at Chewys...great service!! December 2, 2016
Rated 5 out of 5 by 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. October 28, 2014
Rated 5 out of 5 by This product checks all the boxes We have 2 medium size boys, a 20# Australian Terrier Mix and a 30# Standard Schnauzer. (Box#1)In an effort to avoid allergies we searched for a Grain Free product. (Box#2)With all the recalls and health issues of imported products, we insisted on Made in the USA. (Box#3) Our boys love fruits and veggies. With this product you can see real pieces fruits and veggies. And the ratio of it to the kibble is excellent. (Box#4) The kibble quality is top of the line. It holds together very well, no crumbs in the bottom of dish and even very few in the bottom of the bag. (Box#5) The packaging of this Brand keeps it much more fresh. It smells delicious, like "real" food. (Box#6) The Boys love it, they eat every ingredient and our Vet says they are perfect weight and healthy. (Box#7) Is for Chewy.com, we travel extensively and finding a "brick and mortar" store that carries our brand/variety is often difficult/impossible. Chewy.com's shipping is lightening fast and the price is very fair when you factor in the time and travel to find a store. July 1, 2014
Rated 5 out of 5 by My dog loves it! I have fed my 7-year old collie mix several dog foods because I am always looking for something better and researching what's out there for her. I have always fed her premium dog food and switched to grain-free a few years back. She was just okay with whatever I gave her, and never really enthusiastic about any in particular. I decided to try the five-star Castor and Pollux grain-free ultra mix. I knew what I wanted and what I didn't want as far as ingredients go, and his food was right on point, and the price more reasonable than many. After just a couple weeks, I am already starting to notice a difference in her. Scratching has stopped, and she seems more alert and definitely more playful. AND she loves this food. Now she stares me down at mealtime, runs to her bowl, and doesn't leave a morsel. I will definitely order this again. Chewy's price was $10 cheaper than PetSmart, and delivery is fast. February 20, 2016
  • 2017-01-16 T06:16:21.070-06:00
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