Precisely formulated with nutrients to help keep large breed dogs active and fight the first signs of aging. Contains an exclusive complex of antioxidants to help support cellular health.

Helps support large breed dogs’ healthy bones and joints, that can be placed under stress by body weight.

Helps promote optimal digestion with an exclusive formula including very high quality protein and a balanced supply of dietary fiber.

100% Complete and Balanced Nutrition

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Chicken by-product meal, wheat, oat groats, brown rice, brewers rice, corn gluten meal, chicken fat, natural flavors, dried plain beet pulp, wheat gluten, fish oil, vegetable oil, sodium silico aluminate, potassium chloride, calcium carbonate, psyllium seed husk, fructooligosaccharides, sodium tripolyphosphate, 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], salt, L-lysine, taurine, trace minerals [zinc proteinate, manganese proteinate, zinc oxide, ferrous sulfate, manganous oxide, copper sulfate, calcium iodate, sodium selenite, copper proteinate], L-tyrosine, glucosamine hydrochloride, GLA safflower oil, marigold extract (Tagetes erecta L.), green tea extract, L-carnitine, chondroitin sulfate, rosemary extract, preserved with mixed tocopherols and citric acid.

Calorie Content

This diet contains 3787 kilocalories of metabolizable energy (ME) per kilogram or 337 kilocalories ME per cup on an as fed basis (calculated).

Crude Protein (min)24.0%
Crude Fat (min)15.0%
Crude Fiber (max)3.5%
Moisture (max)10.0%
Glucosamine* (min)371 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
57.3 lb (26 kg) 3 1/8 Cups (273 g) 3 1/2 Cups (316 g) 4 Cups (359 g)
61.7 lb (28 kg) 3 1/4 Cups (288 g) 3 3/4 Cups (334 g) 4 1/4 Cups (379 g)
66.1 lb (30 kg) 3 3/8 Cups (304 g) 4 Cups (352 g) 4 1/2 Cups (399 g)
70.5 lb (32 kg) 3 5/8 Cups (319 g) 4 1/8 Cups (369 g) 4 3/4 Cups (419 g)
75 lb (34 kg) 3 3/4 Cups (333 g) 4 3/8 Cups (386 g) 5 Cups (439 g)
79.4 lb (36 kg) 3 7/8 Cups (348 g) 4 1/2 Cups (403 g) 5 1/8 Cups (458 g)
83.8 lb (38 kg) 4 1/8 Cups (363 g) 4 3/4 Cups (420 g) 5 3/8 Cups (477 g)
88.2 lb (40 kg) 4 1/4 Cups (377 g) 4 7/8 Cups (436 g) 5 5/8 Cups (496 g)
92.6 lb (42 kg) 4 3/8 Cups (391 g) 5 1/8 Cups (452 g) 5 3/4 Cups (514 g)
97 lb (44 kg) 4 1/2 Cups (405 g) 5 1/4 Cups (469 g) 6 Cups (532 g)
Royal Canin Size Health Nutrition Large Adult 5+ Dry Dog Food

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Customer reviews

06 Apr 2023

Excellent dog food......!

Switched from Royal Canin for GSD's to this one as my dog is now 6 years old......and he loves it...would Wolf it down, if I would let him....! His coat appears better looking, his poop is firm, he is very active, runs like a Banshee.....and is his endeavors. (And I am not compensated for this review). He is healthy, he is happy, and I am glad. His breeder started him off on Diamond dog food...and all of his dogs seem to do well on that......I went to my Vet, and was told to do my own investigation/research and check out various brands, quantities, etc. and to re-contact the Vet with questions, comments....! Did so, tried this food.....and it works for us....! It is available in locations close by, and Chewy also stocks it. Count us as very satisfied consumers. (My Rescue Border Collie even sneaks some of his food too...Ha Ha....) and she is a picky eater. My advice is to read/research.....and communicate with your Vets, and make an informed decision.....and if your dogs eat it, enjoy it,and have NO issues.....get it....or whatever brand YOU prefer, can afford. I love my pets...and want them to have wonderful lives.....!
Mitus and Barkley
30 Oct 2019

Royal canin

[This review was collected as part of a promotion.] We have two doodles and this dogwood was recommended by one of the breeders who has been breeding dogs for almost 20 years. Our dogs love it and so do we!
23 Oct 2019

Love it

[This review was collected as part of a promotion.] I have two very picky eaters. And when you have 6 dogs having 6 different foods is not practical. So when I tried this food they all loved it and feeding time was now easier. Thanks for making a great food that has trusting ingredients.
22 Oct 2019

Picky Eater

[This review was collected as part of a promotion.] Ripley is my yellow lab, who is extremely picky and bores easily. After finding out she had food allergies, I was forced to find a food that would not effect her. Blue Buffalo, Natural Balance, Wild something or other...They worked fine for the allergies, but some Ripley would not touch, and others she would eat for a few weeks and then stop. I would have to find whatever leftover in the fridge to mix in to get her to eat. Her brother Jack had a reaction to Doggy IB and was prescribed Royal Canin Renal food while he recovered from kidney failure. SHE loved it, no mix in needed. So we found MAXI +5 and it has been our food for 5 years now. She likes the occasional mix in, but will eat the food plain with no problems or pouting.
SRQ HEather
22 Oct 2019

My Vet Recommended

[This review was collected as part of a promotion.] My Vet recommended Royal Canin several years ago, and it is all I have been feeding my dogs ever since. Both of my dogs love the food.
22 Oct 2019

Love Royal Canin!

[This review was collected as part of a promotion.] We started our German Shepherd out on the breed specific as a 2 year old rescue and she did fantastic on it. Great coat and easy on her digestive system. As she has gotten older, we switched her to the large breed for 5 plus with absolutely no problems. I love this brand. We also feed Royal Canin breed specific to our Miniature Schnauzer.
22 Oct 2019

One and only brand for my dog since he was a puppy

[This review was collected as part of a promotion.] Been buying this brand every since my dog was weeks old started with puppy, adult maxi and now maxi aging. So his been eating it years and he loves it. We always get compliments for having a nice and shiny coat.
Kokos dad
15 Oct 2019

Great energy and very happy

My rescue choclate lab had serious urinary tract issues when I first brought her home. We used the Royal Canin SO for a few years and that issue cleared up. As I wanted to ensure that she was getting the proper nutrition, I tried this food and the results are highly positive. Her energy level is outstanding and she is more happy and playful.
07 Oct 2018

A blessing

[This review was collected as part of a promotion.] My German Shepherd supposedly had allergies and was prescribed a RX diet which is expensive. After years of being extra careful with his diet I looked for something he could tolerate and I found Royal Canin Maxi Adult. He loves the bite size and flavor. I've saved a ton of money as well. Thank you Royal Canin
06 Oct 2018

[This review was collected as part of a promotion.] Sadie does wells on this food. Her weight stays at heathy weigh.