Get

In Your Inbox

Dogster is reader-supported. When you buy via links on our site, we may earn an affiliate commission at no cost to you. Learn more.

Can Adult Dogs Eat Puppy Food? Vet-Approved Facts & FAQ

Share

Can Adult Dogs Eat Puppy Food

We all know that there is puppy food and adult dog food. If you are the proud owner of a new puppy, congratulations! But if you already have an adult dog in the home, you know that there’s potentially going to be some sharing of the food between them. Or perhaps you found puppy food that was more affordable than your previous adult dog food, but is puppy food bad for adult dogs?

Adult dogs shouldn’t eat puppy food as their main diet because it can cause health conditions, such as obesity.

Here, we discuss why it’s bad for adult dogs to eat puppy food and give you suggestions on how to prevent it from occurring.

divider dog paws 2 oct 2024

Why Can’t Adult Dogs Eat Puppy Food?

Dog food is formulated to support dogs at different life stages. This means the food contains ingredients and varying nutrition levels to support the puppy, adult, or senior dog.

Puppy food contains certain nutrients in specific ratios for a growing dog. The levels of these nutrients are typically higher in puppy food, and they are also higher in calories, all of which help support a growing puppy.

Compared to adult dogs, puppies need extra calcium, phosphorus, copper, and zinc because they have growing bones and tissues. Adult dogs have slower metabolisms and require food that sustains them and offers maintenance to help support their health and activity levels.

Shetland Sheepdog (Sheltie) dog in the kitchen, eagerly asking for food
Image Credit: OlgaOvcharenko, Shutterstock

dogster face divider

Dangers of Feeding Puppy Food to Adult Dogs

For the most part, it’s not dangerous for an adult dog to eat puppy food if it only happens a few times. However, if an adult eats only puppy food for an extended period of time, various health conditions can occur.

Obesity

Since puppy food is so much higher in calories than adult dog food, one of the main risks is obesity. The average adult dog does not need high calories in their diet and will put on extra weight if consistently fed a diet high in calories.

An overweight dog is often prone to other health problems, such as diabetes, and potentially an overall shorter lifespan.

Joint Issues

Joint problems, particularly arthritis, are definitely a concern when dogs are overweight. Dogs may speed the development of arthritis because they are overweight, or the extra weight can worsen the arthritis of a dog already diagnosed with the disease.

big black dog lying on the floor and gets a massage on its thight
Image Credit: msgrafixx. Shutterstock

Kidney Problems

A diet of puppy food won’t necessarily cause kidney problems in a healthy adult dog, but if the dog already has kidney disease, the high protein in puppy food can exacerbate the condition.

dogster face divider

When Is It Okay to Feed Puppy Food to Adult Dogs?

In certain circumstances, giving puppy food to an adult dog is acceptable and even necessary. However, it must be done under a veterinarian’s supervision. In most cases, this is a temporary solution.

Every dog is unique in their nutritional needs, so we recommend reaching out to a vet for advice.

If you need to speak with a vet but can't get to one, head over to PangoVet. It's our online service where you can talk to a vet online and get the personalized advice you need for your pet — all at an affordable price!

PangoVet_Mention-in-Content Savings V1

Weight Gain

If a dog is severely underweight—which is a common issue when adopting a rescue dog—or if they have a serious illness, a veterinarian might recommend feeding puppy food to the dog for the extra calories.

Puppy food will rebuild the dog’s muscles and enable them to gain weight. This is a temporary situation, as the dog will go back to eating adult dog food once a healthy weight has been achieved.

dog standing on weighing scale
Image Credit: Masarik, Shutterstock

Pregnant or Nursing

Pregnant and nursing dogs require a diet higher in calories and nutrients, which will support the mother and her growing puppies. A female without the right amount of proteins, minerals, and vitamins tends to have a higher puppy mortality rate. Once the puppies are weaned, the mother will be transitioned back to adult dog food.

dogster face divider

How to Prevent Your Dog From Eating Puppy Food

If you’re in a situation where you have a puppy and an adult dog, you must ensure that each one is eating the appropriate food. Puppy food is a big draw for adult dogs because it’s fattier, which automatically makes it yummier. You can take steps to ensure that your dogs will eat the right food.

Separate Them

One option that you can try is to separate your dogs at mealtimes. You can do this by placing them in different rooms or by using baby/dog gates during dinner. Keep them separate until the bowls are licked clean! Microchip feeding stations or bowls can also effectively separate pups to their correct food.

Young brown puppy dog eating from a green bowl in a white kitchen
Image By: Janis Petranis, Shutterstock

Make a Feeding Schedule

You’ll need to avoid free feeding, which means allowing your dogs to eat the puppy food whenever they want. Ensuring that you only feed your dogs at specific times will prevent them from scarfing down the wrong food.

Remove Bowls After Meals

If your puppy doesn’t eat their entire dinner, you’ll need to remove the bowl once they are done eating, and this goes for all dogs.

 

divider dog paws 2 oct 2024

FAQ

Is It Ever Okay to Give a Puppy Adult Dog Food?

It won’t harm your puppy if they eat adult dog food, but it’s best if they stick to puppy food for as long as they are a puppy. They need the extra calories, fat, protein, and calcium to support their growing bodies. If all that they eat is adult dog food, they might have issues with infections, allergies, or slow wound healing as they mature.

When Should You Switch a Puppy to Adult Dog Food?

Typically, a dog is considered an adult at 1 year of age. But the size of the dog factors in quite heavily in how a dog ages.

Small breeds mature faster than large breeds and can be transitioned to adult food between 9 and 12 months of age. Large breeds are more likely to be fully mature by 18 months old. You should have a conversation with a vet to help you decide when your puppy is ready for adult dog food.

How Do You Transition From Puppy Food to Adult Dog Food?

The transition is generally done gradually to avoid an upset stomach. It helps if you plan to use the same brand and flavor of food, which should make the transition easier. It should occur over the course of 5 to 7 days. Start by adding about 25% of the adult dog food to the usual puppy food, which should be 75% of the usual amount. Over the next several days, continue adding more adult food, and take away some of the puppy food until they are only eating adult dog food.

Too sudden a change might cause your dog to have vomiting, diarrhea, and a lack of appetite. It is particularly important to do a slow transition for puppies with food allergies or sensitive stomachs. Speak to a vet if your puppy isn’t taking to the transition well.

dogster face divider

Conclusion

If your dog snatched a mouthful or two of puppy food, there’s no harm done. But if your dog consistently eats too much puppy food, this can put them at risk for obesity, arthritis, and kidney problems. If you have a puppy and a mature dog, you’ll need to feed them separately and remember to pick up their bowls when they’re done so they can’t sneak the other’s food.

It’s essential that your dog eats the right food for their current age and activity level. Speak with your vet to help you determine what the best food is for your dog.

Want content like this delivered to you?

Sign Up For Our Newsletter

News, insights, expert advice, and everything dog

* By submitting, you agree to our Terms & Conditions and Privacy & Cookies Policy.




How useful was this post?

Click on a star to rate (you can leave written feedback after clicking submit)

Help us improve Dogster for pet parents!

Your feedback really matters.

What did you like about this post? Also how can we improve it?

Join the conversation

Leave a Reply

You’re very welcome to leave a comment or question. Please know that all comments must meet our community guidelines, and your email address will NOT be published. Let’s have a positive and constructive conversation.


Talk With A Vet Online

Peace of mind,
anywhere, anytime

Affordable vet advice

Dogster’s Weekly Photo Contest Winners: Best Easter Photo (April 9, 2026)

Every week our team gets the privilege of sorting through our readers photos to choose what dogs will win this weeks contest! See...

We Didn’t Just Add a Dog to Our Life – We Built a Life With Him

“We didn’t just bring a dog home—we built a life together.” Most people are quietly taught a version of pet ownership that looks...

What Most Airlines Won’t Let You Do With Your Dog (Even If You Pay Extra)

Airline pet policies are notoriously hard to navigate. The information is scattered across different pages, buried in FAQ sections, and often contradicts what...

Designer Breeds: Best of Both? New Study Says No

“I’ll take a highly trainable, low-shedding lapdog, hold the heart disease and anxiety!” Something I always found amusing was when people would point...

More related

Pitbull German Shepherd Mix: Info, Pictures, Care & Traits

When you get a German Shepherd Pitbull Mix, you get a friend for life. This mixed dog breed might sound like an aggressive...

American Foxhound Dog Breed: Info, Pictures, Facts, Traits & More

The American Foxhound is one of the oldest and most regal breeds in the United States. The dog has a rich history that...

How Much Does a Dog X-Ray Cost? Pricing 2026 Guide

There are many reasons why dogs may need an X-ray. Your dog may have a broken bone or accidentally ingested something it shouldn’t...

How to Keep a Dog Busy While Working From Home: 16 Expert Tips

As a dog owner, working from home is a double-edged sword. On one hand, you don’t have to worry about finding a dog...

Keep reading

8 Best Hydrolyzed Dog Foods in 2026 – Reviews & Top Picks

Owners are becoming more discerning about the ingredients and preparation of their pet’s food. Many times, there are products that we have never heard of and processes that we do not understand. One thing is for sure, however: When it...

miniature schnauzer dog eating on the sofa

10 Best Dog Foods for Autoimmune Disease in 2026: Vet Approved Reviews

Like humans, dogs have an immune system to protect them from illness and disease. When this natural defense system can’t distinguish between foreign cells and the body’s own cells, it can turn on itself. An autoimmune disease is when the...

Dog-with-a-full-food-bowl_nancy-dressel_shutterstock

14 Best Large Breed Puppy Foods in 2026 – Reviews & Top Picks

All humans may be created equal, but not all puppies grow at equal rates or end up the same size when they are done growing. If you have lost your heart to a large or giant breed puppy, there are...

german shepherd puppy eating dry food outdoors

Can Dogs Eat Nutritional Yeast? Vet-Verified Nutrition Facts & Info

Nutritional yeast is all the rage among health-conscious eaters looking for delicious and nutritious ways to zest up their meals. With its generous mix of protein and essential nutrients, you’re right to wonder if you can offer this vegan-friendly ingredient...

Can-Dogs-Eat-Nutritional-Yeast

Can Dogs Eat Trout? Vet Reviewed Facts & Info

Are you considering giving your dog some tasty trout? You may be wondering if this popular fish is safe for them to digest. So, can dogs eat trout? To cut a long story short, yes they can, but it’s only...

Can Dogs Eat_trout

Can Dogs Eat Squash? Vet-Verified Nutrition Facts & FAQ

Dogs are omnivores (facultative carnivores) and can both eat plant and animal foods to stay happy and healthy throughout their lives. Most dogs are not picky about their food and will even rummage through the garbage for scraps to munch...

Can Dogs Eat_squash

Can Dogs Eat Rutabagas? Vet-Reviewed Facts & FAQ

As a pet parent, you want to ensure your dog is healthy and happy. It’s well known that dogs can eat a variety of vegetables like carrots, spinach, peas, and even fruits like apples and blueberries. And you’ll even find...

Can Dogs Eat_Rutabagas

Canidae Dog Food Review 2026: Recalls, Pros & Cons

Review Summary   Aimed at dogs of all shapes, sizes, and ages, Canidae dog food has been around since 1996 and is one of many high-quality brands available for pets throughout the U.S.A. With its focus on sustainable and regenerative...

Dogster_Canidae Dog Food Review

Love Dogs? So Do We! Join the Dogster Community

Stay informed with expert pet care insights delivered straight to your inbox! Discover professional guidance on animal behavior, feeding tips, trusted product picks, and much more.




Sign up for the Dogster Email Newsletter