Helps support giant breed dogs’ healthy bones and joints, which can be placed under stress by body weight.​

Contains an exclusive complex of antioxidants to help support cellular health.

Formulated with key nutrients (including taurine) to support the heart health of giant dogs.​

100% Complete and Balanced Nutrition

Working toward a sustainable future

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Chicken by-product meal, brewers rice, chicken fat, brown rice, corn gluten meal, wheat, natural flavors, dried plain beet pulp, pea fiber, wheat gluten, fish oil, vegetable oil, potassium chloride, calcium carbonate, salt, choline chloride, vitamins [DL-alpha tocopherol acetate (source of vitamin E), L-ascorbyl-2-polyphosphate (source of vitamin C), biotin, D-calcium pantothenate, vitamin A acetate, pyridoxine hydrochloride (vitamin B6), niacin supplement, folic acid, thiamine mononitrate (vitamin B1), vitamin B12 supplement, riboflavin supplement, vitamin D3 supplement], trace minerals [zinc proteinate, manganese proteinate, zinc oxide, ferrous sulfate, manganous oxide, copper sulfate, calcium iodate, sodium selenite, copper proteinate], taurine, glucosamine hydrochloride, GLA safflower oil, marigold extract (Tagetes erecta L.), magnesium oxide, L-carnitine, chondroitin sulfate, rosemary extract, preserved with mixed tocopherols and citric acid.

Calorie Content

This diet contains 3958 kilocalories of metabolizable energy (ME) per kilogram or 427 kilocalories ME per cup on an as fed basis (calculated).

Crude Protein (min)26.0% Crude Fat (min) 18.0% Crude Fiber (max) 3.9% Moisture (max) 10.0% Taurine* (min) 0.14% Glucosamine* (min) 446 mg/kg Chondroitin sulfate* (min) 4 mg/kg

*Not recognized as an essential nutrient by the AAFCO Dog Food Nutrient Profiles.

Weight Low Activity Medium Activity High Activity
99.2 lb (45 kg) 3 5/8 cups (396 g) 4 1/4 cups (459 g) 4 7/8 cups (521 g)
121.3 lb (55 kg) 4 1/4 cups (461 g) 4 7/8 cups (533 g) 5 5/8 cups (606 g)
132.3 lb (60 kg) 4 1/2 cups (492 g) 5 1/4 cups (569 g) 6 cups (647 g)
143.3 lb (65 kg) 4 7/8 cups (522 g) 5 5/8 cups (604 g) 6 3/8 cups (687 g)
165.3 lb (75 kg) 5 3/8 cups (581 g) 6 1/4 cups (673 g) 7 1/8 cups (765 g)
187.4 lb (85 kg) 5 7/8 cups (638 g) 6 7/8 cups (739 g) 7 3/4 cups (840 g)
220.5 lb (100 kg) 6 5/8 cups (721 g) 7 3/4 cups (835 g) 8 3/4 cups (949 g)
Royal Canin Size Health Nutrition Giant Adult Dry Dog Food

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Customer reviews

22 May 2023

Best kibble for giants hands down.

We've been blessed with two giant breed dogs and this food is hands down the best we could find for them and the only one they've both really loved. The ingredients are far and away better than anything but a raw style diet. And our English Mastiff would only eat this food, she wouldn't even touch anything else. Our Great Dane did prefer the breed specific choice but she doesn't like anything other than Royal Caning and pouts when we try anything else (we had to during the supply chain issues recently).
Dane Dog mom
13 May 2023

Great Dane Food

My Danes love this food, great size for their big mouths and the quality seems to keep them happy/healthy.
23 Apr 2023

Great food and expensive

Good food. Costs way too much money. The large kibble size is appreciated.
24 Feb 2022

Great food but frequently Hard to Find

My Bull Mastiff loves the food but it is expensive and frequently hard to find.
27 Jan 2022

Amazing for Neapolitans

Ever since I brought my Neapolitan home as a puppy I have fed her Royal Canin, and I have to say, the formulas are the best I've found. The kibble size is spectacular for Neapolitans who have a lot of dewlap to work with. It makes it so easy for my girl to pick up and eat and she loves it! She is also a show dog and breeding dog and Royal Canin makes her look absolutely spectacular. I can only hope they make the giant starter available! If not, I'll use the maxi when my girl is bred.
04 Feb 2021

We LOVE this brand!

We have 2 adult Great Danes, both 3 Years old. We started them off with a recommended large breed puppy food that was not Royal Canin, but they had so much stomach upset that we asked our vet what to do. The blood work and stool check showed no intestinal parasites, so the vet recommended that we look at the food that we were feeding. We went online and looked at the ingredients in many dog food brands and came across Bil Jac. We went with Bil Jac large breed puppy for a short time, but were not satisfied with the results. The Danes still had stomach upset and their coats were dull. Furthermore, the kibble was like rabbit food and hard for them to chew because of the size. We then looked at Royal Canin and saw that they have breed specific formulas and the contents were just what our vet recommended. So we began with the "Giant Breed Puppy" Formula. When our girl became pregnant we switched her over to the "HT 42d" Large Breed, which is for breeding females from the 1st day of heat to the 42nd day of gestation. We then switched her to "Starter Maxi Mother and Babydog" formula which is for Mother from the end of gestation until the end of lactation and puppies from 3 or 4 weeks to 8 weeks of age. Both mom and puppies loved this formula and did extremely well with it. Our veterinarian stated that they were the strongest and best looking puppies that he had seen. We kept mom and dad both on "Giant Breed Puppy" for 18 months as recommended by our vet. Following they both went on "Giant Junior" for another year and finally on to "Giant Breed Adult" We are so pleased with their weight, coat and stool formation. Neither have presented any health concerns and the vet stated that is due to good care and nutrition. So thank you Royal Canin for being a big part of good care for our babies.
02 Aug 2020

I just HAD to go back to this food.

I have a Neapolitan and have tried so many different foods. She was on another giant breed formula - but it gave her major gas. So, we switched her over to RC giant adult and it completely rectified her gas issues, and also helped her stool firm up. There are two ingredients in this food that alarm me because they are - possibly - linked to bloat. Because of that I changed her to a completely different "all sizes" dog food. Within a week she was having major diarrhea on herself in her kennel when she had been potty trained for nearly 4 months. She was even suddenly pooping herself in the house. Her stool was nothing but water and it was driving me crazy - and was causing my Neo distress. I had to change her back despite my fears. Within two days back on the food, and she is 98% better. Stool has firmed up. No more accidents - and most importantly - no more going on herself in her kennel. I am still extremely apprehensive about the two ingredients, but I can't deny this food works best for her.
30 Oct 2019

Great texture and taste they've it

[This review was collected as part of a promotion.] We continue to use this product keeps the Shepards active and healthy coats.
30 Oct 2019

Great Food

[This review was collected as part of a promotion.] My dogs love the food--and it has wonderful ratings for its health benefits
23 Oct 2019


[This review was collected as part of a promotion.] I have been buying this for 1 year now and the positive effects on my dog was visible from the first week. My favourite part is the size of the pellets. Buddy gets to actually chew his food.