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.

When to Switch a Great Dane From Puppy to Adult Food? Vet Approved Guide

Share

Two great danes on the sofa

Dogs are similar to children in that one moment, they’re a puppy, then you blink, and they’re all grown up. And like children, dogs will have different nutritional needs to be met as they get older. That means it’s smart to know when to switch a dog from a puppy food to adult food.

In the case of larger dog breeds, you’ll find most recommendations say to switch from puppy to adult food at 12 months of age. However, it’s different in the case of the Great Dane. Though this giant breed tends to grow very quickly, it doesn’t actually mature until much later—around 2 years or so1. This means cartilage and bones are still growing, which requires the nutrients puppy food contains.

So, when can you switch a Great Dane from puppy to adult food? Great Danes should be switched at 18 months of age.

divider dog paws 3 oct 2024

How to Switch a Great Dane from Puppy to Adult Food

Now that you know when to switch your Great Dane puppy to adult food, it is time to learn how to switch foods without having it upset your pup’s stomach. You can’t just put down puppy food one day, and then adult food the next; this is a recipe for gastrointestinal issues. Instead, you’ll need to make the food switch slowly, so your Great Dane has an easier time with the transition.

Do not worry that a slow switch will take forever, though. You can easily switch your dog from puppy to adult food in just four days.

Here’s how:
  • Day 1: 75% puppy food, 25% adult food
  • Day 2: 50% puppy food, 50% adult food
  • Day 3: 75% adult food, 25% puppy food
  • Day 4: 100% adult food
That’s it! It takes less than a week to switch your dog’s food out slowly enough. When it comes to the type of adult food you choose, you probably want to continue with the same brand as the puppy food (and even the same flavor if possible). This will also make the transition easier for your pup.

Great Dane Puppy Eating
Image Credit: Rick’s Photography, Shutterstock

The Dangers of Overfeeding

It can be easy to overfeed a Great Dane, whether they’re a puppy or an adult. However, you need to be very aware of how much you’re feeding your pet, as overfeeding a giant breed dog may not just result in obesity. Too much food for your dog can actually lead to joint diseases, such as osteochondritis or hip and elbow dysplasia as excess food encourages rapid growth, which can negatively impact giant breeds.

To figure out the best amount to feed your Great Dane, check out the bag of dog food for feeding guidelines or speak to a vet about what’s appropriate. Overall, though, Great Danes may generally require 6–10 cups of food a day depending on their current size.

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

The Dangers of Eating Too Quickly

Many dog breeds tend to gobble down their food, and this habit of eating too quickly isn’t as innocuous as one might think. Eating too fast is just one-way bloat (or gastric dilation volvulus) can occur in dogs, and unfortunately, this is one of the biggest killers of Great Danes. There are ways you can reduce the chances of this occurring, though.

First and foremost, use a slow feeder to prevent your pet from eating its food in one gulp. Slow feeders make it harder for your dog to get food out of the bowl, which means it can’t eat nearly as fast as it typically does. These come in a variety of shapes, sizes, and colors, so you shouldn’t have difficulty finding one that works for your Great Dane. Other than eating too quickly, other possible causes of bloat in dogs include:

  • Exercising right after eating
  • Having a single meal a day
  • Stress

So, don’t feed your Great Dane just once a day. Instead, break it down into two or more meals throughout the day, and ensure your pet isn’t going for long runs or engaging in rambunctious play in the backyard for at least an hour after eating. You may also consider a prophylactic procedure (that is frequently done in breeds predisposed to bloat) called gastropexy for your Dane, which involves tacking the stomach to the abdominal wall.

Male veterinarian examining Great Dane on cancer in vet clinic
Image Credit: Lucky Business Shutterstock

divider dog paws 3 oct 2024

Conclusion

Great Danes grow quickly but don’t fully mature until later, so they shouldn’t be switched from puppy to adult food until they’ve reached 18 months of age. When switching your dog’s food, you should do a slow transition to avoid any stomach upset (which will still only take 4 days or so). You should also take care to avoid overfeeding your Great Dane to reduce the risk of degenerative joint diseases that can occur from eating too much and growing too quickly.

Finally, ensure your dog isn’t eating too fast, no matter what age it is. Eating quickly can cause bloat, which is one of the biggest killers of the Great Dane. You can give your dog its food in a slow feeder to help it eat at a more normal pace and also help prevent bloat by discouraging exercise after a meal and feeding your Great Dane two or more meals a day.


Featured Image Credit: Martin Tajmr, Pixabay

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.


Dogster's Digital Magazine is Back!​

Dogster Magazine Cover June 2026

Vet-approved health & behavior advice

Real dog stories & community features

Why Some Dogs Treat Mealtime Like Playtime – And When to Pay Attention

Most dogs are reliable eaters. Bowl goes down, food disappears. So when a dog starts batting kibble across the kitchen floor, tossing pieces...

Major Win for Dogs: Ontario Becomes the Final Province to Ban Ear Cropping and Debarking

​​Ontario has approved new animal welfare regulations that will prohibit elective ear cropping and devocalization (debarking) procedures in dogs from January 1, 2027....

Dogster’s Weekly Photo Contest Winners: Most Adorable Puppy (June 8, 2026)

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

The Spice Cabinet Dangers Most Dog Owners Don’t Think About

Most people know chocolate is off-limits for dogs. Fewer realize that some of the most common herbs and spices sitting in a kitchen...

More related

8 Best Dog Toys for Small Dogs in 2026 – Reviews & Top Picks

Dog toys are an important item to have, whether your dog weighs over 100 pounds or is a small breed like a Chihuahua....

6 Best Eco-Friendly Dog Collars in 2026 – Reviews & Top Picks

Whether it’s a purple nylon collar or one with a unique design, all pet parents agree that their dogs need a high-quality, durable...

5 Benefits of Dog Yoga for Pets & Their Humans

Yoga can be positively life-changing for people. So can dogs. So why not combine the two for ultimate physical and mental health? Surely,...

Can Dogs Learn Sign Language? Vet-Approved Training Tips

Dogs have an incredible ability to learn a wide range of things, including sign language. Whether the dog is deaf or the owner...

Keep reading

Before You Add Olive Oil to Your Dog’s Bowl – Read This!

You drizzle it on your salad, cook with it, and probably have a bottle sitting proudly on your counter. Olive oil is celebrated for its heart-healthy fats and antioxidants, but what about your dog? Can your furry friend benefit too,...

olive oil

10 Best Soft Dry Dog Foods in 2026 – Reviews & Top Picks

Choosing a new brand of dog food for your pup can feel like a daunting task. There are so many factors to consider, from ingredients to texture. Soft, dry dog food is easier for some dogs to chew, especially those...

happy jack russell terrier dog with bowl full of food in front

Can Dogs Eat Caviar? Vet-Reviewed Nutrition Facts

As dog owners, we want the best for our pets, including what they eat. However, some dog parents take things to the next level by offering their pups gourmet human foods, such as caviar. While dogs can occasionally eat caviar,...

Can Dogs Eat_Cassava

9 Best Inexpensive Dog Foods for Large Breeds in 2026 – Reviews & Top Picks

If there’s one thing that everyone can agree on, it’s the desire to feed our dogs the healthiest food there is. But this isn’t always possible, as high-quality dog food is less than budget-friendly. When it comes to large breeds,...

labrador-retriever-dog-eating

Can Dogs Eat Flan? Vet-Reviewed Potential Risks & Safety Guide

Flan is a custard-like dessert that can contain several ingredients. However, it typically contains eggs, milk, and sugar. While dogs can eat a small amount of dairy products like flan, it isn’t recommended. While flan isn’t toxic, it isn’t usually...

Can Dogs Eat Flan

Is Glycerin in Dog Food & Treats Bad for Dogs? Vet-Reviewed Safety Guide

We all know that one key to a healthy dog’s life is high-quality dog food. You look for ingredients such as whole meats and grains and ensure the diet is complete and balanced. You may not be looking for glycerin,...

dry dog food in bowl

11 Best Lamb Dog Foods in 2026 – Reviews & Top Picks

These days, most dog owners are aware that many food allergies that affect our dogs come from common protein sources. In response, more dog food is being made with novel proteins, including lamb. Or maybe you’re looking at lamb for...

brown dog sniffing a dog food

How to Switch Your Dog’s Food: 6 Vet-Approved Steps

When we choose a dog food, we might not consider that our dog won’t be a match for one reason or another. Or perhaps you haven’t had the results with the dog food that you are currently on and want...

fluffy dog eating dry kibble from elevated bowl

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