Royal Canin Size Health Nutrition Giant Dog Food Review (Dry)

Royal Canin Size Health Nutrition Giant product range consists of three recipes which each receive the Dog Food Advisor’s rating, 3 stars.

Dog food tailored for giant-sized dogs of all ages.

The table below shows each recipe in this range including our rating and the AAFCO nutrient profile: Growth (puppy), Maintenance (adult), All Life Stages, Supplemental or Unspecified.

Recipe and Label Analysis

Royal Canin Giant Adult was selected to represent the other products in the line for detailed recipe and nutrient analysis.

Ingredients Analysis

The first ingredient in this dog food is chicken by-product meal, a dry rendered product of slaughterhouse waste. It’s made from what’s left of a slaughtered chicken after all the choice cuts have been removed.

In addition to organs, this item can also include feet, beaks, undeveloped eggs and almost anything other than prime skeletal muscle.

On the brighter side, by-product meals are meat concentrates and contain nearly 300% more protein than fresh chicken.

The quality of this ingredient can vary, depending on the caliber of the raw materials obtained by the manufacturer.

The second ingredient is brewers rice. Cereal grain by-product consisting of the small fragments left over after milling whole rice. Aside from the caloric energy it contains, this item is of only modest nutritional value to a dog.

The third ingredient is chicken fat. Chicken fat is obtained from rendering chicken, a process similar to making soup in which the fat itself is skimmed from the surface of the liquid.

Chicken fat is high in linoleic acid, an omega-6 fatty acid essential for life. Although it doesn’t sound very appetizing, chicken fat is actually a quality ingredient.

The fourth ingredient is brown rice, a complex carbohydrate that (once cooked) can be fairly easy to digest. However, aside from its natural energy content, rice is of only modest nutritional value to a dog.

The fifth ingredient is corn gluten meal. Gluten is the rubbery residue remaining once corn has had most of its starchy carbohydrate washed out of it.

Although corn gluten meal contains 60% protein, this ingredient would be expected to have a lower biological value than meat.

And less costly plant-based products like this can notably boost the total protein reported on the label – a factor that must be considered when judging the actual meat content of this dog food.

The sixth ingredient is wheat. Like corn, wheat is an inexpensive and controversial cereal grain. And aside from its energy content, this grain is of only modest nutritional value to a dog.

For this reason, we do not consider wheat a preferred component in any dog food.

After the natural flavors, we find beet pulp. Beet pulp is a controversial ingredient, a high fiber by-product of sugar beet processing.

Some denounce beet pulp as an inexpensive filler while others cite its outstanding intestinal health and blood sugar benefits.

We only call your attention here to the controversy and believe the inclusion of beet pulp in reasonable amounts in most dog foods is entirely acceptable.

The ninth ingredient is pea-fiber, a mixture of both soluble and insoluble dietary fiber derived from pea hulls. Aside from the usual benefits of fiber, this agricultural by-product provides no other nutritional value to a dog.

From here, the list goes on to include a number of other items.

But realistically, ingredients located this far down the list (other than nutritional supplements) are not likely to affect the overall rating of this Royal Canin product.

With four notable exceptions…

First, vegetable oil is a generic oil of unknown origin. The ratio of omega-6 to omega-3 fats in any oil is nutritionally critical and can vary significantly (depending on the source).

Without knowing more, it’s impossible to judge the quality of an item so vaguely described. However, compared to a named animal fat, a generic vegetable oil cannot be considered a quality ingredient.

Next, fish oil. Fish oil is naturally rich in the prized EPA and DHA type of omega-3 fatty acids. These two high quality fats boast the highest bio-availability to dogs and humans.

Depending on its level of freshness and purity, fish oil should be considered a commendable addition.

We also note the use of taurine, an important amino acid associated with the healthy function of heart muscle. Although taurine is not typically considered essential in canines, some dogs have been shown to be deficient in this critical nutrient.

And lastly, this food includes 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.

Nutrient Analysis

Based on its ingredients alone, Royal Canin Giant Adult looks like an average dry product.

The dashboard displays a dry matter protein reading of 29.9%, a fat level of 20.7% and estimated carbohydrates of about 37.3%.

As a group, the brand features an average protein content of 32.1% and a mean fat level of 18.5%. Together, these figures suggest a carbohydrate content of 37.3% for the overall product line.

And a fat-to-protein ratio of about 59%.

Which means this Royal Canin product line contains…

Near-average protein. Above-average fat. And below-average carbs when compared to other dry dog foods.

When you consider the protein-boosting effect of the wheat and corn glutens, this looks like the profile of a dry product containing a moderate amount of meat.

Royal Canin Dog Food Recall History

The following automated list (if present) includes all dog food recalls related to Royal Canin through June 2026.

No recalls noted.

You can view a complete list of all dog food recalls since 2009 here.

Our Rating of Royal Canin Size Health Nutrition Giant Dry Dog Food

Royal Canin Size Health Nutrition Giant is a grain-inclusive dry dog food using a moderate amount of named by-product meal as its dominant source of animal protein, thus receiving 3 stars.

Recommended with Reservations

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