Castor and Pollux Natural Ultramix Grain Free canned dog food receives the Advisor’s top rating of 5 stars.
The Castor and Pollux Natural Ultramix Grain Free product line includes one grain-free dog food, a recipe claimed to meet AAFCO nutrient profiles for all life stages.
Castor and Pollux Natural Ultramix Grain Free Beef and Vegetable Dinner
Canned Dog Food
Estimated Dry Matter Nutrient Content
Ingredients: Beef, beef broth, carrots, potatoes, peas, natural flavor, sunflower oil, calcium carbonate, sodium phosphate, guar gum, potassium chloride, choline chloride, minerals (zinc amino acid complex, iron amino acid complex, manganese amino acid complex, copper amino acid complex, potassium iodate, cobalt glucoheptonate, sodium selenite), vitamins (vitamin E supplement, vitamin B12 supplement, d-calcium pantothenate, vitamin A supplement, niacin, vitamin D3 supplement, riboflavin supplement, folic acid, pyridoxine hydrochloride, biotin, thiamine mononitrate), salt, flaxseed oil, agar-agar, locust bean gum, flaxseed, xanthan gum
Fiber (estimated dry matter content) = 7.8%
Red items indicate controversial ingredients
|Estimated Nutrient Content|
|Dry Matter Basis||44%||22%||25%|
|Calorie Weighted Basis||36%||44%||21%|
The first ingredient in this dog food is beef. Beef is defined as “the clean flesh derived from slaughtered cattle” and includes skeletal muscle or the muscle tissues of the tongue, diaphragm, heart or esophagus.1
Beef is naturally rich in all ten essential amino acids required by a dog to sustain life.
The second ingredient is beef broth. Broths are nutritionally empty. But because they add moisture to a dog food they are a common finding in many canned products.
The third ingredient includes carrots. Carrots are rich in beta-carotene, minerals and dietary fiber.
The fourth ingredient is potato. Potatoes can be considered a gluten-free source of digestible carbohydrates. Yet with the exception of perhaps their caloric content, potatoes are of only modest nutritional value to a dog.
The fifth ingredient includes peas. Peas are a quality source of carbohydrates. And like all legumes, they’re rich in natural fiber.
However, peas contain about 25% protein, a factor that must be considered when judging the meat content of this dog food.
After the natural flavor, we find sunflower oil. Sunflower oil is nutritionally similar to safflower oil. Since these oils are high in omega-6 fatty acids and contain no omega-3’s, they’re considered less nutritious than canola or flaxseed oils.
Sunflower oil is notable for its resistance to heat damage during cooking.
There are several different types of sunflower oil, some better than others. Without knowing more, it’s impossible to judge the quality of this ingredient.
The eighth ingredient is calcium carbonate, likely used here as a dietary mineral supplement.
From here, the list goes on to include a number of other items.
But to be realistic, ingredients located this far down the list (other than nutritional supplements) are not likely to affect the overall rating of this product.
With three notable exceptions…
First, we find flaxseed oil, one of the best non-fish sources of omega-3 fatty acids — essential to a dog’s health.
Next, we note the use of flaxseed, one of the best plant sources of healthy omega-3 fatty acids. Provided they’ve first been ground into a meal, flax seeds are also rich in soluble fiber.
However, flaxseed contains about 19% protein, a factor that must be considered when judging the actual meat content of this dog food.
And lastly, this food contains chelated minerals, minerals that have been chemically attached to protein. This makes them easier to absorb. Chelated minerals are usually found in better dog foods.
Castor and Pollux Natural Ultramix
Grain Free Canned Dog Food
The Bottom Line
Judging by its ingredients alone, Castor and Pollux Natural Ultramix Grain Free looks like an above-average canned dog food.
But ingredient quality by itself cannot tell the whole story. We still need to estimate the product’s meat content before determining a final rating.
And a fat-to-protein ratio of about 50%.
Above-average protein. Near-average fat. And below-average carbs when compared to a typical canned dog food.
Even when you consider the protein-boosting effect of the peas and flaxseed, this looks like the profile of a wet product containing a significant amount of meat.
Castor and Pollux Natural Ultramix Grain Free is a meat-based canned dog food using a generous amount of beef as its main source of animal protein, thus earning the brand 5 stars.
Please note certain recipes are sometimes given a higher or lower rating based upon our estimate of their total meat content and (when appropriate) their fat-to-protein ratios.
Castor and Pollux Dog Food
The following list (if present) includes all dog food recalls since 2009 directly related to this product line. If there are no recalls listed in this section, we have not yet reported any events.
To learn why our ratings have nothing to do with a product’s recall history, please visit our Dog Food Recalls FAQ page.
Get free dog food recall alerts sent to you by email. Subscribe to The Advisor’s recall notification list.
Dog Food Coupons
Readers are invited to check for coupons and discounts shared by others in our Dog Food Coupons Forum.
Or click the buying tip below. Please be advised we receive a fee for referrals made to the following online store.
A Final Word
The descriptions and analyses expressed in this and every article on this website represent the views and opinions of the author.
The Dog Food Advisor does not test dog food products.
We rely almost entirely on the integrity of the information posted by each company on its website. As such, the accuracy of every review is directly dependent upon the quality of the test results from any specific batch of food a company chooses to publish.
Although it's our goal to ensure all the information on this website is correct, we cannot guarantee its completeness or its accuracy; nor can we commit to ensuring all the material is kept up-to-date on a daily basis.
Each review is offered in good faith and has been designed to help you make a more informed decision when buying dog food.
However, due to the biological uniqueness of every animal, none of our ratings are intended to suggest feeding a particular product will result in a specific dietary response or health benefit for your pet.
For a better understanding of how we analyze each product, please read our article, "The Problem with Dog Food Reviews".
Remember, no dog food can possibly be appropriate for every life stage, lifestyle or health condition. So, choose wisely. And when in doubt, consult a qualified veterinary professional for help.
In closing, we do not accept money, gifts or samples from pet food companies in exchange for special consideration in the preparation of our reviews or ratings.
However, we do receive a fee from Chewy.com for each purchase made as a direct result of a referral from our website. This fee is a fixed dollar amount and has nothing to do with the size of an order or the brand selected for purchase.
Have an opinion about this dog food? Or maybe the review itself? Please know we welcome your comments.
Notes and Updates
05/03/2016 Last Update
- Association of American Feed Control Officials ↩