# Senior Dog Food (2026): What 'Senior' on the Bag Does and Doesn't Mean > AAFCO has no senior life stage, so a senior dog food is an adult food. Five senior formulas with the AAFCO statement from each maker's page, and what to check. - Source: https://petprooflab.com/food-feeding/senior-dog-food - Publisher: PetProofLab (https://petprooflab.com) - Published: 2026-09-28 - Category: food-feeding - Tags: senior dog food, older dog, AAFCO statement, adult maintenance, dog calories, Purina Pro Plan, Hill's Science Diet, Royal Canin, Blue Buffalo - Method: picks chosen from Amazon listings and brand specs; not hands-on tested; current Amazon prices are on the page; content checked 2026-09-28. - Quick answer: "Senior" on a dog food bag has no legal meaning. AAFCO has no senior life stage, so every senior food here carries an adult maintenance statement, and nutrient levels vary a lot from brand to brand. A healthy older dog in good shape can stay on its adult food. If you do switch, Purina Pro Plan Adult 7+ and Hill's Science Diet Adult 7+ both passed AAFCO feeding tests for adult maintenance, per their makers; Royal Canin's Aging formulas and Blue Buffalo Life Protection Senior meet the maintenance profile by formulation. Compare calories per cup, not the word on the front. ## Key takeaways - AAHA's 2023 senior care guidelines say AAFCO "does not currently have guidelines for senior nutrition"; AAFCO's recognized life stages are gestation/lactation, growth, maintenance and all life stages. - Tufts veterinary nutritionists say there is "no legal definition" for senior dog food and protein, phosphorus and calories vary by manufacturer. - Tufts says a lower-protein diet is not beneficial for a healthy older dog and may add to muscle loss. - Pro Plan Adult 7+ and Hill's Science Diet Adult 7+: feeding tests, adult maintenance. Royal Canin Small Aging 12+, Medium Aging 10+ and Blue Buffalo Life Protection Senior: formulated for maintenance. - Calories per cup run from 290 (Royal Canin Medium Aging 10+) to 366 (Pro Plan Adult 7+) among these five, per the makers, so the scoop has to change when the food does. ## Products (chosen from listings, not tested) 1. **Purina Pro Plan Complete Essentials Senior (Adult 7+) Chicken & Rice, 18 lb** (details: https://petprooflab.com/food-feeding/senior-dog-food#product-B003XKB9YU) — Buy it if you want a senior food backed by feeding trials and a familiar chicken-and-rice recipe. - Pros: Purina's statement: "Animal feeding tests using AAFCO procedures substantiate that Pro Plan Adult 7+ Shredded Blend Chicken & Rice Formula provides complete and balanced nutrition for maintenance of adult dogs."; Purina lists 366 kcal per cup; chicken is the first ingredient, with EPA and glucosamine, per the listing; The listing says it was formerly sold as SAVOR Shredded Blend; sold by Amazon.com - Cons: Hard kibble mixed with tender shredded pieces, per the listing, rather than a single kibble 2. **Hill's Science Diet Adult 7+ Dry Dog Food, 15 lb** (details: https://petprooflab.com/food-feeding/senior-dog-food#product-B07L54GCVH) — A feeding-trial senior food with fewer calories per cup than Pro Plan, for a dog that is starting to gain weight. - Pros: Hill's statement for Adult 7+ Chicken Meal, Barley & Rice: "Animal feeding tests using AAFCO procedures substantiate that Hill's Science Diet Adult 7+ Chicken Meal, Barley & Rice Recipe Dog Food provides complete and balanced nutrition for maintenance of adult dogs."; Hill's lists 352 kcal per cup and recommends it for dogs 7 years and older; Made in the USA, per the listing; sold by Amazon.com - Cons: The Amazon title does not name the recipe; check that the bag says Chicken Meal, Barley & Rice 3. **Royal Canin Small Aging 12+ Senior Dry Dog Food, 12 lb** (details: https://petprooflab.com/food-feeding/senior-dog-food#product-B007B2SWIW) — The pick for a small dog in its teens, with kibble you can soften. - Pros: Royal Canin's statement: "ROYAL CANIN SMALL Aging 12+ is formulated to meet the nutritional levels established by the AAFCO Dog Food Nutrient Profiles for maintenance."; For small dogs over 12 years old, up to 22 lb, per Royal Canin; 308 kcal per cup; Kibble can be softened with water for dogs that find it hard to chew, per the listing; sold by Amazon.com - Cons: Met by formulation, not a feeding trial 4. **Royal Canin Medium Aging 10+ Senior Dry Dog Food, 30 lb** (details: https://petprooflab.com/food-feeding/senior-dog-food#product-B00CGRM3C8) — For a medium-size dog past 10 that needs fewer calories per scoop. - Pros: Royal Canin's statement: "ROYAL CANIN MEDIUM Aging 10+ is formulated to meet the nutritional levels established by the AAFCO Dog Food Nutrient Profiles for maintenance."; For dogs of 23 to 55 lb aged 10 and up, per the listing; Royal Canin lists 290 kcal per cup, the lowest of the five here; Sold by Amazon.com - Cons: Only the 30 lb bag was in this pick; met by formulation, not a feeding trial 5. **Blue Buffalo Life Protection Formula Senior Chicken & Brown Rice, 15 lb** (details: https://petprooflab.com/food-feeding/senior-dog-food#product-B0009YUG9M) — A grain-inclusive senior recipe for owners who prefer Blue Buffalo, with an ordinary adult maintenance statement behind it. - Pros: Blue Buffalo's statement: "BLUE Life Protection Formula Chicken and Brown Rice Recipe Food for Senior Dogs is formulated to meet the nutritional levels established by the AAFCO Dog Food Nutrient Profiles for maintenance."; Blue Buffalo lists 343 kcal per cup; glucosamine and chondroitin, and brown rice, barley and oatmeal, per the listing; Sold by Amazon.com - Cons: Met by formulation, not a feeding trial; the Amazon listing says "nutrient profiles for senior dogs", which is not an AAFCO category A senior dog food is an adult dog food with a different label on the front. AAFCO has no senior life stage, so each of the five foods here carries an adult maintenance statement. Purina Pro Plan Adult 7+ and Hill's Science Diet Adult 7+ back theirs with feeding trials, Royal Canin's Aging formulas and Blue Buffalo's Senior recipe by formulation. A healthy older dog in good body condition does not have to switch at all. **How we chose:** we did not feed or test these foods; we read the AAFCO statement and calorie figure for each on the maker's own site and kept foods sold by Amazon.com and in stock on September 28, 2026. ## Five senior dog foods and their AAFCO statements | Food | Life stage in the AAFCO statement | Basis | kcal per cup (maker) | Sold by | Amazon price | |---|---|---|---|---|---| | [Pro Plan Adult 7+ Chicken & Rice](https://petprooflab.com/food-feeding/senior-dog-food#product-B003XKB9YU) | Maintenance of adult dogs | Feeding tests | 366 | Amazon.com | see the current Amazon price on the page | | [Hill's Science Diet Adult 7+](https://petprooflab.com/food-feeding/senior-dog-food#product-B07L54GCVH) | Maintenance of adult dogs | Feeding tests | 352 | Amazon.com | see the current Amazon price on the page | | [Royal Canin Small Aging 12+](https://petprooflab.com/food-feeding/senior-dog-food#product-B007B2SWIW) | Maintenance | Formulation | 308 | Amazon.com | see the current Amazon price on the page | | [Royal Canin Medium Aging 10+](https://petprooflab.com/food-feeding/senior-dog-food#product-B00CGRM3C8) | Maintenance | Formulation | 290 | Amazon.com | see the current Amazon price on the page | | [Blue Buffalo Life Protection Senior](https://petprooflab.com/food-feeding/senior-dog-food#product-B0009YUG9M) | Maintenance | Formulation | 343 | Amazon.com | see the current Amazon price on the page | The statements and calorie figures come from [Purina's Adult 7+ page](https://shop.purina.com/pro-plan-complete-essentials-shredded-blend-chicken-rice-probiotics-senior-dry-canine-food), [Hill's Adult 7+ page](https://www.hillspet.com/dog-food/science-diet-mature-adult-dry), [Royal Canin's Small Aging 12+ page](https://www.royalcanin.com/us/dogs/products/retail-products/small-aging-12%2b-1007), [Royal Canin's Medium Aging 10+ page](https://www.royalcanin.com/us/dogs/products/retail-products/medium-aging-10%2b-2448) and [Blue Buffalo's Senior page](https://www.bluebuffalo.com/dry-dog-food/life-protection-formula/senior-chicken--brown-rice-recipe/). ## There is no AAFCO senior life stage The small-print sentence on the back of the bag is the nutritional adequacy statement, and [AAFCO's label guide](https://www.aafco.org/consumers/understanding-pet-food/reading-labels/) lists the life stages it can name: gestation/lactation, growth, maintenance and all life stages. "Senior" is not among them. The [2023 AAHA Senior Care Guidelines](https://www.aaha.org/resources/2023-aaha-senior-care-guidelines-for-dogs-and-cats/nutrition/) say the same thing from the veterinary side: AAFCO "does not currently have guidelines for senior nutrition." The [FDA explains](https://www.fda.gov/animal-veterinary/animal-health-literacy/complete-and-balanced-pet-food) that AAFCO has two nutrient profiles for dogs, one for growth and reproduction and one for adult maintenance, and that a food labeled "complete and balanced" must meet one of them or pass an AAFCO feeding trial. A senior food meets the adult one. That is why every statement in the table above ends with "maintenance." So what does "senior" on the front tell you? The Tufts veterinary nutritionists behind [Petfoodology](https://sites.tufts.edu/petfoodology/2016/03/08/when-should-i-switch-my-pet-to-a-senior-diet/) answer directly: "there is no legal definition for 'senior' or 'geriatric' foods," and while owners may assume it means lower protein, phosphorus and calories, "the levels vary by manufacturer so each manufacturer's senior food will have different properties." The word tells you who the maker is marketing to. The statement and the calorie line tell you what is in the bag. There is no fixed age either. AAHA's guidelines [define a senior dog](https://www.aaha.org/resources/2023-aaha-senior-care-guidelines-for-dogs-and-cats/defining-the-senior-patient/) as one in "the last 25% of estimated lifespan through end of life," which comes sooner for a Great Dane than for a Chihuahua. The makers pick their own cutoffs: 7+ for Purina, Hill's and Blue Buffalo, 10+ and 12+ for Royal Canin's size-based Aging foods. ## Does an older dog need a senior food at all? Often not. Tufts writes that "many older dogs and cats can continue to eat a good quality commercial diet designed for adults and do not need to be changed to a different diet," and that if a senior dog "is healthy, in good body condition, and eating a good quality nutritionally balanced diet, there is no reason to change foods." The reasons to change are specific: weight gain, weight loss, or a disease where diet helps. Tufts lists arthritis, diabetes, cancer, dental problems, heart disease and kidney disease as conditions where "dietary adjustments may help improve symptoms or even slow progression." Those are conversations with your veterinarian, and some of them end in a therapeutic diet rather than anything on this page. Ask your vet before changing an older dog's food if it has a diagnosed condition; this page is general information, not veterinary advice ([more on that](https://petprooflab.com/about#veterinary)). ## What actually changes as a dog ages **Calories.** AAHA's guidelines say a dog's maintenance energy requirement "generally decrease[s] over a dog's lifetime," that senior dogs "need less caloric density and more fiber" to keep a good body condition, and that obesity in seniors "is more common in dogs" than in cats. They also note that calorie-restricted diets have been shown to increase dogs' longevity, with an ideal body condition score of 4.5 to 5 out of 9. Tufts adds the other side: not every old dog gains weight, and one that is losing weight with no medical cause may need a food with more calories per cup. **Protein.** This is where the marketing and the evidence part ways. Tufts says "reduced dietary protein is not beneficial for the healthy older dog or cat" and "lower protein diets for older dogs and cats may have negative effects by contributing to muscle loss." AAHA says dogs "tend to lose LBM [lean body mass] and gain fat as seniors," and that a senior diet "may include mild increases in protein content and quality." Some senior foods lower protein and some raise it, Tufts notes, so read the guaranteed analysis rather than assuming. **Phosphorus and sodium.** Tufts says lower phosphorus helps dogs with kidney disease but it is not known whether it prevents kidney disease, and senior foods "range widely in phosphorus content." Sodium restriction is "unnecessary for the general population of older dogs," but recommended with heart disease, high blood pressure or kidney disease. Both are questions to take to your vet with a bloodwork result in hand. **Supplements.** If the food is a complete and balanced commercial diet, Tufts says added vitamins and minerals are unnecessary, and any supplement should be used "only in collaboration with your veterinarian's advice." ## Reading the five foods **If you want feeding-trial backing:** Pro Plan Adult 7+ and Hill's Science Diet Adult 7+ are the two here whose makers say they passed AAFCO feeding tests for adult maintenance. A Tufts nutritionist's [puppy food checklist](https://sites.tufts.edu/petfoodology/2021/11/29/whats-the-best-food-for-your-new-puppy/) calls feeding trials "ideal" while saying a formulated diet from a manufacturer that passes its other checks "should be fine as well," a point our [best puppy food guide](https://petprooflab.com/food-feeding/best-puppy-food) covers in more detail. If you are weighing these two brands, our [Purina Pro Plan vs Hill's Science Diet comparison](https://petprooflab.com/food-feeding/purina-pro-plan-vs-hills-science-diet) sets their statements side by side. **If your dog is gaining weight:** calories per cup matter more than the word senior. Among these five, Royal Canin Medium Aging 10+ lists 290 kcal per cup and Pro Plan Adult 7+ lists 366, so the same scoop delivers about a quarter more energy with the Purina food. Switching between them without changing the scoop would over- or under-feed. Weigh the food if you can, and weigh the dog every month or two. **If your dog is small and very old:** Royal Canin Small Aging 12+ is sized for dogs up to 22 lb over 12 years of age, and the listing says the kibble can be softened with water. AAHA notes a study in which adding moisture to food increased nutrient digestibility in senior dogs. **If you prefer a grain-inclusive "natural" brand:** Blue Buffalo Life Protection Senior is made with brown rice, barley and oatmeal, per the listing. One thing to notice: the Amazon listing says it meets AAFCO "nutrient profiles for senior dogs." There is no such profile. Blue Buffalo's own page gives the formal statement, and it says maintenance. None of the five foods here is grain-free; if that question is on your mind, our guide to [grain-free dog food and DCM](https://petprooflab.com/food-feeding/grain-free-dog-food-and-dcm) explains the FDA investigation. ## How to switch an older dog's food Switch gradually. Tufts' guidance on [changing foods](https://sites.tufts.edu/petfoodology/2019/11/24/how-do-i-switch-my-pets-food/) is to mix in more of the new food over at least a week. Watch body condition and muscle over the following months, not just the number on the scale: AAHA says evaluating muscle and body condition scores "can help monitor normal aging and age-related disease changes and determine when nutritional adjustment may be needed." Treats count too. The same calorie arithmetic applies to biscuits and chews, and our guide to [dog training treats](https://petprooflab.com/food-feeding/dog-training-treats) covers the "10% of daily calories" rule and how to count it. A [slow feeder bowl](https://petprooflab.com/food-feeding/slow-feeder-dog-bowls) can stretch a smaller meal for a dog that has been put on fewer calories. ## Foods we left out, and recalls **IAMS ProActive Health Healthy Aging** is sold by Amazon.com, and IAMS's [Healthy Aging page](https://www.iams.com/products/dry/iams-healthy-aging) says the food "is complete and balanced for adult dogs." We could not find the formal AAFCO statement, with its life stage and basis, printed on that page, so it did not get a card. Check the bag. We checked every brand here against our [pet product recall page](https://petprooflab.com/recalls), which tracks FDA and CPSC pet recalls from January 2024 to September 28, 2026. None of these Purina Pro Plan, Hill's Science Diet, Royal Canin or Blue Buffalo foods appears on it. Royal Canin's parent company, Mars Petcare, recalled two Pedigree dog foods in that period (May 2024 and July 2026); no Royal Canin product was named in those notices. Food is one part of looking after an older dog. Our [senior dog essentials guide](https://petprooflab.com/life-stages/senior-dog-essentials) covers ramps, rugs and beds, and our [orthopedic dog bed guide](https://petprooflab.com/home-beds/orthopedic-dog-beds) goes deeper on sleeping support. If you also have an older cat, the same labeling rule applies; see our [senior cat food guide](https://petprooflab.com/food-feeding/senior-cat-food). ## Frequently Asked Questions ### Is there an AAFCO senior life stage for dog food? No. AAFCO recognizes gestation/lactation, growth, maintenance and all life stages, and AAHA's 2023 senior care guidelines state that AAFCO "does not currently have guidelines for senior nutrition." Senior dog foods carry an adult maintenance statement. ### At what age should a dog switch to senior food? There is no set age, and a healthy dog may never need to. AAHA defines a senior dog as one in the last 25% of its expected lifespan, and Tufts says a healthy older dog in good body condition on a balanced diet has no reason to change foods. ### Should an older dog eat less protein? Not if it is healthy. Tufts says reduced protein "is not beneficial for the healthy older dog" and may contribute to muscle loss, and AAHA says a senior diet may include mild increases in protein. Dogs with kidney disease are a separate case for your vet. ### Is a senior dog food lower in calories? Sometimes, but not reliably. Tufts says calories in senior foods "vary widely," and among the five here, the makers list from 290 to 366 kcal per cup. Compare the calorie statement on the bag. --- *PetProofLab is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com. We did not feed or test these foods; AAFCO statements, calorie figures and age ranges are the makers' own, from their websites and listings. This guide is general information and is not veterinary advice.* ## Sources - shop.purina.com: [Purina's Adult 7+ page](https://shop.purina.com/pro-plan-complete-essentials-shredded-blend-chicken-rice-probiotics-senior-dry-canine-food) - hillspet.com: [Hill's Adult 7+ page](https://www.hillspet.com/dog-food/science-diet-mature-adult-dry) - royalcanin.com: [Royal Canin's Small Aging 12+ page](https://www.royalcanin.com/us/dogs/products/retail-products/small-aging-12%2b-1007) - royalcanin.com: [Royal Canin's Medium Aging 10+ page](https://www.royalcanin.com/us/dogs/products/retail-products/medium-aging-10%2b-2448) - bluebuffalo.com: [Blue Buffalo's Senior page](https://www.bluebuffalo.com/dry-dog-food/life-protection-formula/senior-chicken--brown-rice-recipe) - Association of American Feed Control Officials: [AAFCO's label guide](https://www.aafco.org/consumers/understanding-pet-food/reading-labels) - American Animal Hospital Association: [2023 AAHA Senior Care Guidelines](https://www.aaha.org/resources/2023-aaha-senior-care-guidelines-for-dogs-and-cats/nutrition) - U.S. Food and Drug Administration: [Complete and balanced pet food](https://www.fda.gov/animal-veterinary/animal-health-literacy/complete-and-balanced-pet-food) - sites.tufts.edu: [Petfoodology](https://sites.tufts.edu/petfoodology/2016/03/08/when-should-i-switch-my-pet-to-a-senior-diet) - American Animal Hospital Association: [Defining the senior patient](https://www.aaha.org/resources/2023-aaha-senior-care-guidelines-for-dogs-and-cats/defining-the-senior-patient) - sites.tufts.edu: [Whats the best food for your new puppy](https://sites.tufts.edu/petfoodology/2021/11/29/whats-the-best-food-for-your-new-puppy) - sites.tufts.edu: [Changing foods](https://sites.tufts.edu/petfoodology/2019/11/24/how-do-i-switch-my-pets-food) - iams.com: [Healthy Aging page](https://www.iams.com/products/dry/iams-healthy-aging) --- Last updated: 2026-09-28 Canonical URL: https://petprooflab.com/food-feeding/senior-dog-food How to cite: "Senior Dog Food (2026): What 'Senior' on the Bag Does and Doesn't Mean", PetProofLab, https://petprooflab.com/food-feeding/senior-dog-food (checked 2026-09-28). Disclosure: as an Amazon Associate PetProofLab earns from qualifying purchases. Safety information summarizes public guidance and is not medical advice.