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.

What Is Dog Mismating? Vet-Reviewed Facts & Tips

dog sniffing dog in heat

Dogs are fun, intelligent creatures that many people enjoy spending their lives with. However, overbreeding and mismating can result in unwanted animals that end up homeless and suffering. Many unwanted dogs face terrible fates, including death. Luckily, we humans have a great deal of control over how many dogs exist in the world at any given time. Knowing about dog mismating is the first step that we can take toward gaining the knowledge and empowerment that we need to ensure that we do not bring dogs into this world that will not be loved and properly cared for. In short, dog mismating is when a female dog gets pregnant by accident.

Dogster divider_v1_NEW_MAY_24_

What Is Dog Mismating?

In short, dog mismating is when a female dog gets pregnant accidentally, when it is not planned in any way. Female dogs generally go into heat two times a year, about 6 months apart. This offers plenty of opportunities for them to get pregnant if they are not spayed and can mingle with unneutered males. Mismating results in unplanned and/or unwanted pregnancies and stressed human family members who do not know what to do with the puppies that their dog has unknowingly conceived.

Mismating is also the term to call termination of pregnancy or abortion. This should be discussed with a vet on a case-by-case basis. Not all dog encounters will result in mating, and not all mating will result in pregnancies.

Note: The intention of this post is to provide general medical information and not moral guidance. Any decisions you make should be discussed and overseen by your veterinarian. Your vet knows your family’s unique circumstances and can provide individualized recommendations for the best possible outcome.

pregnant Dogue de Bordeaux
Image Credit: Jan Dix, Shutterstock

What Can Be Done About Mismating?

Mismating can be completely avoided by having dogs spayed or neutered. If you plan to breed your dog in the future or spaying or neutering is not an option, it is vital to make sure that your pooch is constantly supervised when outside of their home and where they have access to other non-spayed or unneutered dogs.

If you own a female dog, make sure you know when her heat cycle starts and ends so she can be walked on a leash and avoid busy places and times throughout the cycle. If you are unsure of when your bitch goes into heat, you should speak to a vet to clarify what are the signs of being in heat; and if your dog does not show them, to know what the reason behind it is. If you own both a male and female that are intact, we recommend that you find alternative living arrangements for the male throughout the entirety of your female’s heat cycle. The male can be reintroduced to the home after the heat cycle ends. If necessary, reintroduce the male and female slowly in the yard until they are comfortable around each other again.

Beagle on estrus cycle
Image Credit: Sigma_S, Shutterstock

What to Do if Mismating Occurs

You may not know if mismating occurred until after your dog is heavily pregnant or even until your dog’s puppies are born, in which case, it is too late to do anything about it. You can do your best to care for the puppies and give them the best life possible, but you obviously cannot take the pregnancy back.

If you find out that your dog is pregnant when you do not want her to be, there are a couple of things that you can do about it. First, you should speak to a veterinarian to go through your options for termination of pregnancy. Alternatively, you can try to find a person or organization that is willing to take the puppies in and make sure that they get good homes.

Did you know you can speak to a veterinarian without having to travel? Just head over to PangoVet. It's an 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

Dogster divider_v1_NEW_MAY_24_

In Summary

Dog mismating should not be taken lightly. It can lead to an overwhelming number of unwanted dogs in your community that can take a toll on the dogs and the humans who live around them. Hopefully, our guide has shed a bit of light on the topic and given you the knowledge and ideas needed to keep your dog from mating with another dog when you do not want them to.


Featured Image Credit By: atiger, 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

How to Select the Right Dog Whistle for Training: Expert Advice

A crucial aspect of being a dog parent is training your furry friend and helping them learn how to socialize and obey when...

NutriCanine Dog Food Review 2025: An Expert’s Breakdown

As pet owners, we always want to give our fur babies top-quality meals. One way that we can give our pets premium food...

Can Dogs Eat Goji Berries? Vet-Verified Facts & FAQ

If there’s one so-called superfood that’s made a big splash in the last few years, it’s goji berries. Known for their sour flavor...

Corgi vs Chihuahua: The Key Differences (With Pictures)

Chihuahuas and Corgis originate from opposite sides of the world, and their differences don’t end there. Tiny Chihuahuas hail from Mexico, where they...

More related

Why Do Dogs Chase Cats? 4 Reasons & How to Stop It

If you’re both a dog and a cat owner, odds are you’ve wondered why your canine can’t stop chasing your feline. This can...

Why Is My Dog Peeing Blood? Possible Reasons & What to Do (Vet Answer)

Noticing blood in your dog’s urine is a scary sight for any dog owner. Some dogs pee blood while appearing otherwise completely well,...

10 Common Health Problems in Dalmatians: Vet-Approved Health Facts & FAQs

Dalmatians are a dignified and intelligent breed. They are well-known for their intriguing, beautiful spotted coats, as so proudly shown in Disney’s 101...

Reactive Dog Training: 7 Vet-Approved Tips to Help Your Dog Relax

Reactivity is one trait that can make life significantly challenging for dogs and their owners. Daily walks must stay limited to low-stress areas,...

Keep reading

11 Best Dog Foods for Golden Retrievers in 2025 – Reviews & Top Picks

Golden Retrievers are one of the most beloved dogs in the United States. These friendly and lovable dogs can be prone to specific health conditions and diseases, so it’s important to make sure that they’re eating the right kinds of...

golden retriever dog eating healthy dry food from bowl at home

Can Dogs Eat Pomegranates? Vet-Verified Nutrition Facts & Info

Pomegranate is widely billed as being a superfood for humans, thanks to the diverse range of vitamins and minerals it contains, and the concentration of them. They are particularly known for being high in fiber and potassium as well as...

Dogster-Can-Dogs-Eat-Pomegranates

How Much Does a Cup of Dog Food Weigh? Vet-Approved Guide

Every pet parent wants the best for their pets. This includes feeding your dog the appropriate amount of food each day. While this seems like a simple enough task, it’s trickier than you might think. In fact, a recent study...

measures a portion of dry dog food using an electronic scale

Can Dogs Eat Cupcakes? Vet-Approved Facts & FAQ

People love to eat all kinds of sweets, including cupcakes. Most dogs are also tempted by sweets, so if you have a furry companion, you may wonder if they can eat cupcakes. In general, dogs can technically eat cupcakes just...

Can Dogs Eat Cupcakes

8 Best Dog Foods for Weight Loss in 2025 – Reviews & Top Picks

Most dogs love to eat and we love to feed them! Giving them food and treats that we know that they enjoy makes us happy. The downside is that dogs can gain weight if we aren’t careful with their diets....

Shetland sheepdog eats food from a food bowl

9 Best Venison Dog Foods in 2025 – Reviews & Top Picks

If you have a dog that loves meat, then feeding them venison-based dog food is a great idea. Not only is venison a lean and nutritious protein source, but it’s also a delicious way to keep your pup happy and...

Dog food in a bowl

What to Feed a Pregnant Dog: First, Second & Third Trimesters (Vet-Approved Guide)

Good news! Your dog is expecting puppies! This is an exciting time in any pet parent’s life. But it can also be overwhelming if this is your dog’s first litter. You want to make sure you are giving your dog...

Sausage dog pregnant laydown at the bed Dauchand

Can Dogs Eat Churros? Vet-Reviewed Facts & FAQ

If you’ve ever had a churro, you know that they are practically impossible to resist. Who could say no to a crispy sugar-coated shell with a fluffy interior? Chances are, even the dog wants a bite. However, for the sake...

Can Dogs Eat Churros