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.

Why Isn’t My Puppy Eating? 8 Vet-Reviewed Reasons

Share

Jack russell terrier looking up. Puppy sitting on wooden floor. Dog with an empty food bowl. Sad and hungry puppy

Puppies have big appetites, so it can be worrisome when they don’t want to eat. Although it can be quite common for new puppies not to have a hearty appetite when you first bring them home, it is unusual for an adjusted puppy to start refusing food. There are several reasons why your puppy isn’t eating, ranging from new foods, illness, certain dietary preferences, and teething pain.

These possible reasons will be explained more thoroughly in this article.

divider dog faces oct 2024

The 8 Reasons Why Your Puppy Isn’t Eating

1.  Unfamiliar Food

When you bring a new puppy home, they have a lot of things to get used to, food being one of them. Not every puppy will be comfortable enough to eat unfamiliar foods, as all foods have a slightly different smell, taste, and texture. It can be a lot for pickier eaters to take on in one day, so it’s always best to try to decrease the amount of change that you can and try to feed them the same food as their previous diet if possible and slowly transition to a new diet if you want to.

beagle puppy eating from a feeding bowl
Image Credit: Monika Wisniewska, Shutterstock

2. Adjusting to a New Environment

An unfamiliar environment can be stressful for a puppy, which can make them feel too uncomfortable to eat. There are many strange smells and sounds in a new environment that puppies need to adjust to. Once they start feeling more comfortable in the new environment, they may regain their appetite.

It’s important to make the adjustment period as stress-free as possible for new puppies. Keep them in a quiet area of the home with a comfortable bed or crate and their food and water. You want to gradually introduce them to other pets or family members to avoid stressing them out further.


3. Teething

By the time a puppy is between 12 and 16 weeks old, they will begin losing their baby teeth so that their adult teeth can start growing. The teething process can last 2-3 months, and you might notice rice-sized teeth lying around the home. Teething can cause puppies to feel uncomfortable and even painful, as their gums can become swollen. This could cause them to eat less.

Teething puppies might struggle to eat dry kibble or other hard foods that further irritate their sensitive gums. Introducing softer foods that don’t cause teething puppies pain can help encourage them to eat.

It is best to consult with a veterinarian about the right diet for your teething puppy if you feel it is the cause of their poor appetite.


4. Parvovirus

Canine parvovirus is a virus that commonly affects unvaccinated dogs or puppies that haven’t received the parvovirus vaccine yet. One of the first signs a puppy could be sick from parvovirus is a reduced appetite and lethargy. These signs can become more severe as the virus progresses and they may start experiencing gastrointestinal signs such as diarrhea and vomiting.

It’s important to take your puppy to a veterinarian if you suspect they may have parvovirus. Puppies without the core parvo vaccine that have been exposed to an environment with other dogs are at major risk for this virus.

Labrador puppy at the vet
Image Credit: In Green, Shutterstock

5. Food Preferences

Just like people, puppies can have different food preferences, too. Not every type of food is going to appeal to them, so they might be reluctant to eat it. Some puppies prefer wet foods over dry foods or specific flavors. If they are not happy about the food they are offered, they might not want to eat it.

Also, drastic changes in their diet could affect their appetite. For example, if your puppy was eating wet food with a chicken flavor, switching them to kibble with a beef flavor could affect their appetite. It’s important to slowly transition puppies from an old diet to a new diet. You could add some of their old food with the new food and gradually lessen the amount of old food until they are eating the new food.


6. Digestive Issues

There are a number of digestive issues that could affect a puppy’s appetite.

They include:
  • Constipation
  • Gastritis
  • Gastrointestinal obstruction
  • Bloat
  • Colitis
  • Gastroenteritis

When a puppy is experiencing digestive issues, they may be reluctant to eat and show other worrisome signs such as lethargy, diarrhea, or vomiting. You might also notice changes in their stool and bowel movements. Abdominal pain is a common sign of most digestive issues in puppies, which can be uncomfortable and make them hesitant to eat.

Most digestive issues are serious in puppies and require veterinary treatment. You should contact a veterinarian immediately if you notice your puppy is showing signs of digestive issues. Serious digestive issues such as bloat or gastrointestinal obstructions require an emergency trip to a veterinarian as prompt treatment is essential to save your puppy.


7. They want to play

Most puppies are go-at-all-costs balls of energy that require short naps to recharge. Sometimes, they can be so focused on playing or hanging out with you that they won’t eat for fear of missing something. This is especially true if they will eat when you’re with them but will abandon the food bowl the instant you walk away.

For these puppies, it’s okay to sit with them until they are done or try feeding smaller meals more frequently so that they can quickly eat and then move on to the next thing without missing a meal or any of the excitement.

mini bernedoodle puppy running
Image Credit: Georgi Baird, Shutterstock

8. Vaccinations

It’s not unusual for some puppies to lose their appetite shortly after receiving their vaccinations from a vet. Most puppies tolerate their vaccinations well, but one of the mild side effects could be a reluctance to eat or eat less than normal. This is usually accompanied by other signs such as fatigue, irritation at the injection site, and a low-grade fever. These signs typically only last 24-48 hours post-vaccination and will get better on their own. See your vet if they don’t.

If you’re concerned about your dog’s health we suggest you speak to a vet.

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 advice you need for your dog — all at an affordable price!

PangoVet_Mention-in-Content Savings V1

divider dog faces oct 2024

Conclusion

Puppies should have a hearty appetite and eat throughout the day. It’s not good for them to go without eating for very long, and a lack of appetite is not a good sign. Some possible reasons for puppies not to eat are mild, while others are concerning and need medical treatment.

Puppies can be reluctant to eat new foods in unfamiliar environments or shortly after their vaccinations. More worrisome reasons are digestive problems, such as an obstruction causing stomach pain and vomiting.

If your puppy isn’t eating and showing signs of illness or pain, they should be taken to a veterinarian.


Featured Image Credit: Olena Vasylieva, Getty Images

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

The Organization Helping Pets Feel Safer, Happier, and ‘Fear Free’ – Heroes of the Pet World

For many pet owners, stress during veterinary visits, grooming appointments, travel, or even routine handling can feel like an unavoidable part of life...

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...

More related

Can Dogs Eat Chicken Broth? Vet-Verified Nutrition Facts & Info

Among all the possible culinary additions we might use to enhance the flavor, texture, and nutrition of our dog’s diet, we rarely need...

Silkzer (Miniature Schnauzer & Silky Terrier Mix): Info, Pictures, Care & More

The Silkzer is a hybrid dog created by crossing a purebred Silky Terrier with a Miniature Schnauzer. It’s an energetic small dog that...

Dog Seizures: Causes, Signs, Treatments & Care (Vet Answer)

If you’ve ever seen your dog have a seizure, you know how horrible it can be. Most of the time, a seizure lasts...

Heed Dog Food Review 2026: Pros, Cons, Recalls & Guide

Review Summary Heed dog food is a newer dog food brand that is relatively unknown. However, their offering of fresh kibble is quickly...

Keep reading

Can Dogs Have Vanilla? Vet-Verified Nutrition Facts & FAQ

Vanilla is a common additive that is used to flavor sweet treats like cake, biscuits, and ice cream. Although some people keep and use the pods in their culinary efforts, most homes have vanilla extract, which is made by combining...

Dogster-Can-Dogs-Have-Vanilla

How to Keep Your Dog From Eating Other Dogs’ Food: 3 Vet-Approved Methods

Feeding time is already frustrating enough without dealing with a food-stealing dog. Luckily, several proven methods improve your dog’s behavior around mealtime. We’ll try to cover a variety of approaches, and hopefully, one of them will be perfect for you...

golden retriever dog stealing food from another dog's bowl

8 Amazing Benefits of Bone Broth for Dogs & Why We Love It (Vet Approved)

We want our pups to be as healthy as possible, so we make sure they eat nutritious dog food and exercise daily. But is there more we can do to ensure our dogs’ health and well-being? There is! One great...

bone broth bouillon in stainless steel pot

Can Dogs Eat Calamari? Vet-Verified Nutrition Facts & Risks

Calamari is an Italian word for squid, which is exactly what calamari is. You can find calamari in most seafood restaurants, and it’s a favorite among many seafood lovers. If you bring your pooch to a seafood restaurant that allows...

Can Dogs Eat_calamari

How to Keep Ants Out of Dog Food: 10 Easy & Effective Tips

Do you have a problem with ants getting into your dog food? If so, you’re not alone. Ants are persistent and can find their way into even the most well-protected areas. In this blog post, we will discuss how to...

ants on dry kibble

Victor Dog Food vs Bully Max: Our 2026 Comparison – Pros, Cons & What to Choose

With the number of dog food brands out there, you are bound to stumble across similar brands in your search for the best option. At first glance, it seems that only the packaging is different, while the ingredients, nutrition, and...

Dogster_Dog Food Victor VS Bully Max

Can Dogs Eat Mango? Vet-Approved Safety & Feeding Tips

No matter what you’re eating, your dog likely stares on with envy. Most dogs love to eat what their humans eat, but dogs have no idea if the food is good or bad for them or possibly even downright toxic—this...

Can Dogs Eat Mango

Can Dogs Eat Raw Salmon? Vet-Verified Nutrition Facts & Advice

Salmon is packed full of healthy nutrients and is considered by some to be one of the healthiest protein sources since it provides essential vitamins and is a great source of omega-3 fatty acids. But what about raw salmon? Is...

Can Dogs Eat_salmon

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