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.

My Rescue Dog Has Diarrhea, Is It Common? Vet-Approved Facts & FAQ

Share

a cute dog in animal shelter

One of the most common issues that new dog owners face when bringing home a dog from the shelter or a rescue is the presence of diarrhea. Many rescue dogs can end up having diarrhea after they come home, and many times, this diarrhea ends up on your carpet. This can be stressful, frustrating, and concerning. How common is diarrhea in rescue dogs? Should you worry about it? How long does it take to go away?

These are common questions that many people ask after bringing a rescue dog home from the shelter, and we have the answers. In the vast majority of cases, diarrhea in rescue dogs is common and benign. It should resolve itself quickly after your dog settles in, but that is not always the case. Here is everything you need to know about diarrhea in rescue dogs, including what to do about it and when to be concerned.

dogster paw divider

How Common Is Diarrhea in Rescue Dogs?

Diarrhea is very common in rescue dogs. In fact, it is one of the most common health conditions that dogs suffer from as they transfer from a shelter to a new home. Most diarrhea incidents clear up within a few days. Diarrhea is so common in rescue dogs that most shelters will provide information about this transitional diarrhea when you adopt your dog.

As long as the diarrhea is mild, your dog isn’t showing any other signs, and it clears up in a few days, there should be no need to worry.

The 3 Causes of Diarrhea in Rescue Dogs

There are three main causes of diarrhea in shelter dogs. Those causes include stress (or anxiety), changes in diet, and parasites.

1. Stress

Stress and anxiety from being in the shelter or the move to your home can create inflammation in a dog’s digestive system or throw off the normal balance of gut bacteria. Either way, diarrhea can result. Once your new dog gets comfortable with their new surroundings and feels safe in your home, the diarrhea will often clear up.

sick male beagle dog lying on the sofa
Image Credit: Przemek Iciak, Shutterstock

2. Diet Changes

Diet, including a change in diet or poor diet, can also lead to diarrhea. Some shelters feed their dogs donated food, which means that dogs can eat a variety of different things on any given day. Your dog will probably also get a change in diet when you bring them home. This constant change can lead to digestive upset, including diarrhea.

Once you settle on food for your new dog, be consistent and stick with it. If you are worried about transitioning your dog’s diet, you can ask the shelter what food they were feeding so that you can gradually switch them over to help alleviate instances of diarrhea.


3. Parasites

Lastly, your dog could be suffering from a parasitic infection. The shelter is full of dogs of all kinds, and they all share one environment. This can lead to the transfer of parasites from one dog to another. Most parasite infections can be easily treated with deworming medications, but some infections might require more intensive treatment from your veterinarian. If you are concerned that your dog might have parasites, it is best to bring them in for a checkup at the vet to make sure that everything is normal.

The bottom line is that rescue dogs go through a series of serious changes in a very short amount of time. They get a new home, new diet, new family, and new routine all in a matter of days. This upheaval can have a number of effects on your dog, and many of them can lead to diarrhea.

beagle dog sick sad on bed
Image Credit: Iryna Imago, Shutterstock

dogster paw divider

How Serious Is Diarrhea in Shelter Dogs?

Diarrhea is usually not serious in shelter dogs. It can be annoying and frustrating to deal with, but it usually resolves in a few days with little to no treatment. Diarrhea is considered serious if it is explosive, constant, or if it is paired with other signs. You should be concerned if your dog is having constant diarrhea and also refuses to eat or if your dog is showing signs of lethargy or has blood in the stool.

Frequent diarrhea can lead to dehydration, which can be serious if it persists. Normally, mild diarrhea is not a cause for immediate alarm or concern. If your dog is having a short bout of diarrhea and it does not seem to be affecting their mood, attitude, or behavior, then the issue will likely resolve on its own in a few days.

How to Treat Diarrhea in Your Rescue Dog

Often diarrhea in your newly adopted dog will resolve by itself once they get settled in and require no treatment. However, if it fails to go away or becomes more severe with other signs, speak to your vet. They may recommend withholding food, a change in diet, or the addition of probiotics and fiber.

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 pet — all at an affordable price!

PangoVet_Mention-in-Content Savings V1

When to See a Veterinarian

It is often recommended that owners take their rescue dogs to the vet within a week of bringing them home, regardless of whether they have diarrhea. A checkup will help ensure that your new dog doesn’t have any health concerns, and it will get their new medical file started for future visits and treatments. You should take your dog to the vet if they are having explosive diarrhea, won’t eat, aren’t settling in, or are showing signs of lethargy or labored breathing. You can also bring them in if you want to seek medication to help alleviate the signs (and the mess) of your dog’s issues.

Severe diarrhea may need professional treatment including antibiotics or other medications and supportive care such as fluids or hospitalization.

vet examines dog
Image Credit: SeventyFour, Shutterstock

dogster paw divider

Conclusion

Seeing diarrhea in your new rescue dog can be worrying, but it is very common. Rescue dogs have everything about their lives changed in an instant, which can lead to stress and digestive problems. This commonly results in mild diarrhea that will often resolve in just a couple of days with some at-home monitoring.

If the diarrhea does not clear up in a reasonable amount of time or if you are worried about your new dog’s overall health, you should consult your veterinarian for advice and medication.

See also:


Featured Image Credit: MAD.vertise, Shutterstock

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

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...

A Major Breakthrough in Canine Anxiety Care: FDA Approves First Dual-Purpose Medication

Why This FDA Approval Is Such Important News For years, veterinarians and pet parents have struggled with a frustrating reality in canine behavioral...

Ask Dr. Paola- Help! Can Shock Collars Cause Seizures? (June 1, 2026)

Welcome to our “Ask Dr. Paola” series, where every Monday we bring expert advice straight from Dr. Paola Cuevas (MVZ) to help our...

Behind Most “Bad” Dog Behavior Is a Pretty Simple Problem (and Solution)

Dogs are supposed to be easygoing companions, and many seem to live up to it: sleeping on the couch for hours, watching the...

More related

ESA Doctors Letter Service Review 2026: Our Expert’s Breakdown

Your pet is your family. They love you unconditionally and are there for you through the ups and downs of life. As a...

Male vs Female Border Collies: The Differences (With Pictures)

Border Collies are increasingly popular dogs. If you’re considering adopting one, it is essential that you choose the right sex for you. While...

Do Maine Coons Get Along With Dogs? Introduction & Safety Tips

Whether you’re looking to add a Maine Coon to your home or to add a dog when you already have this cat breed,...

Anaplasmosis In Dogs: Our Vet Explains the Signs, Causes & Treatment

Many people have heard of Lyme disease, a common tick-borne disease seen in dogs across the United States. However, another common tick-borne disease...

Keep reading

6 Best Air-Dried Dog Foods in 2026 – Reviews & Top Picks

Air-dried dog food hasn’t been around on the market for all that long, but it deserves more attention than it’s been given. Often over-shadowed by freeze-dried or dehydrated dog food, air-dried dog food is often overlooked but can stand its...

miniature schnauzer dog eating on the sofa

Puppy vs Adult Dog Food: Vet-Verified Differences & When to Switch Diets

Whether we realize it or not, as dog owners, we have a significant influence over the health and wellbeing of our dog, with the food we choose playing one of the most important roles. Alongside exercise, training, and vet care,...

Dogster_Puppy vs Adult Dog Food

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

Treating your dog sometimes takes a little creativity when you’re out of their usual fare. We know apples make for a healthy snack, but what about their more kid-friendly cousins, the jars of applesauce? While not all varieties are suitable,...

Can Dogs Eat Applesauce

Can Dogs Eat Goat Cheese? Vet-Verified Nutrition Facts & FAQ

Goat cheese might not be among America’s top 15 most consumed cheeses, but it certainly has its fans. You probably won’t have any problem getting your dog to eat it, but does that mean you should? The answer raises more...

Can Dogs Eat Goat Cheese

Can Dogs Eat BBQ Chips? Vet-Approved Facts & FAQ

When you’re enjoying a bag of BBQ potato chips and your dog hits you with those pleading eyes, you might wonder if it would be okay to give your dog a few chips. Are they safe for dogs? Generally speaking,...

Can Dogs Eat_bbq chips

Purina Pro Plan vs. Kirkland Dog Food: Pros, Cons & What to Choose

Trying to choose the right dog food can be an overwhelming experience. Comparing ingredient lists, calories, nutrition tables, and flavors seems like a never-ending, confusing battle. You want to give your dog the best food possible, but it’s difficult to...

Dogster_Dog Food Purina Pro Plan VS Kirkland

10 Best Stainless-Steel Dog Bowls in 2026 – Reviews & Top Picks

There are many different dog food bowls, but stainless-steel bowls are some of the best options for many dogs. They’re more durable than other materials and can also be more hygienic. There isn’t much variety in stainless steel bowls, but...

two fluffy dogs eating from the triple stainless steel feeders

Can Dogs Eat Vegetable Oil? Vet-Verified Facts & FAQ

Vegetable oil is used in cooking and found in a variety of products, which may have you wondering if it’s safe for your dog. After all, it’s easy to accidentally give your dog something with vegetable oil without realizing it....

can dogs eat vegetable oil featured graphic Dogster

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