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

Dog Health & Care

Dog Mating Guide: Cycles, Factors & Tips

Rachael Gerkensmeyer
By Rachael GerkensmeyerUpdated on June 17, 2026
Share
Dog sniffing dog in heat

Mating dogs can be a rewarding experience, but the practice must be done responsibly and with the parent and puppies' health and welfare as a priority. There is much to learn about mating dogs before the first breeding attempt. We have put together this dog mating guide to help make preparing and planning for a mating experience more successful and enjoyable. Here is everything that you need to know about dog mating.

divider dog paws 3 oct 2024

It All Rides on the Female's Cycle

You are free to use this image but we do require you to link back to Dogster.com for credit

Dogs must rely on the female’s reproductive cycle to conceive. If a female dog is not “in heat,” she cannot conceive puppies and generally won’t mate because she or a male dog will have little interest. Mating in heat also does not guarantee conception. The timing of matings has to be within a fertile window around the time of ovulation. Female dogs, or bitches, typically go into heat, which is technically referred to as the estrus cycle, twice a year. The estrus cycle usually lasts anywhere from 2 to 4 weeks. Bitches typically go into heat for the first time when they’re around 6–12 months old or older, depending on the breed, but it is highly advised to wait until your girl reaches skeletal maturity before you consider breeding her. This typically coincides with breeding on the second or third heat cycle. Once you have noticed that your bitch is in heat, it’s time to call your veterinarian. To determine the best time to mate, the vet can perform a few tests to determine when ovulation is likely to happen. They can do blood tests looking at one of two hormones (progesterone or luteinizing hormone) or take cell samples from the vagina. The window of highest fertility will occur 2 days before or 4 days after ovulation. On average, this is between days 10 and 14 of estrus. However, it varies between bitches, so getting the vet tests is the most reliable way to go.

Signs That a Female Dog Is in Heat

Since a female dog must be in heat to reproduce, it is important to look for signs of their cycle to determine when mating should take place. The first phase is called proestrus, where a few physical changes start happening. She won’t ovulate or want to mate in this phase. In true estrus, she will have behavior changes. Luckily, there are a variety of signs that bitches tend to display as they go into heat and work their way through the estrus cycle. Here is what to look for:

  • A change in appetite
  • Behavioral changes
  • Increased urination frequency
  • Swelling of the vulva
  • Vaginal discharge
  • Receptivity to male dogs

A female in heat will usually show interest in males and turn her butt toward them when they are ready to mate. She will move her tail to the side and enable a male dog to mount.

Photo Credit: Reshetnikov_art, Shutterstock

Choosing Breeding Dogs

It is important to consider things such as the size, temperament, and breed of a prospective mate for your bitch. Ideally, you will be breeding purebred dogs with the goal of improving the breed. This means your parent dogs will both have sound temperaments, representing the best of their breed. You should also have an idea of the common health problems facing the parent breed(s). The goal is to breed healthy puppies with no genetic or congenital problems.

At a basic level, both dogs should have been vet checked and cleared of any conditions or defects that could be passed onto the offspring. Breed-specific screening tests, such as genetic tests, heart screening examinations, and hip scoring, should also be performed to ensure healthy puppies.

Responsible Breeding Considerations

You’re welcome to use our images, but we require you link directly to this site for credit (ex. Image from Dogster)

Many dogs in the world have no homes and nobody to feed them. They end up in animal shelters, and many live as strays until they pass away, which is sometimes at a young age. Therefore, it is important to practice responsible breeding when mating your dog with another at any time. Never let your female dog spend time with other dogs of the opposite sex when she is in heat unless you are ready to breed, or you might find yourself dealing with raising unwanted puppies.

Always make sure that you have a plan for what will happen to the puppies once they are weaned. If you will not keep them all, ensure that there is a market for your puppies, and give them a good home before they are born. If you cannot control your dog’s breeding, it is crucial to think about getting them spayed or neutered.

Once your bitch is pregnant, you should get an X-ray in the final trimester to know how many puppies to expect. You will also need to research common complications of pregnancy and puppy rearing like dystocia, retained placenta, puppy mortality, aspiration pneumonia, orphaned puppies, mastitis, and milk fever. You must be prepared for each and every one of these possibilities and others. Breeding pups can take an emotional and financial toll and be incredibly time-consuming.

divider dog paws 3 oct 2024

Final Thoughts

It is always a good idea to consult with a professional breeder before mating your dog with another for the first time. Spend plenty of time researching, preparing, and gathering supplies before you even consider making puppies. What kinds of puppies are you thinking about breeding? How many litters do you plan to bring into existence? Share your thoughts with our community.

Related Reads:

Sources
  • https://www.msdvetmanual.com/dog-owners/reproductive-disorders-of-dogs/management-of-reproduction-in-dogs

  • https://www.petmd.com/dog/general-health/dog-in-heat

  • https://shelleydriveanimalclinic.net/blog/244280-what-is-the-best-age-for-a-dog-to-get-pregnant

  • https://vcahospitals.com/know-your-pet/breeding-for-pet-owners-estrus-and-mating-in-dogs

  • https://www.vin.com/apputil/content/defaultadv1.aspx?pId=11372&meta=generic&catId=35318&id=5709846&ind=268&objTypeID=17


Featured Image Credit: atiger, Shutterstock

Want content like this delivered to you?

News, insights, expert advice, and everything dog

Rachael Gerkensmeyer
Authored by

Rachael Gerkensmeyer

When is the Best Time to Mate a Dog? Facts & FAQ

When is the Best Time to Mate a Dog? Facts & FAQ

If you have a healthy, non-spayed, purebred, and capable female, the idea of breeding might have crossed your mind. You might be looking to carry on your femal…

Ashley Bates
By Ashley Bates · 5 days ago
When Is the Best Time to Breed a Dog in Her Heat Cycle?

When Is the Best Time to Breed a Dog in Her Heat Cycle?

Trying to breed a dog is no easy task, even if you know exactly what you're doing. One of the hardest things to figure out is the exact time to breed your dog.…

Nicole Cosgrove
By Nicole Cosgrove · 2 weeks ago
9 Signs a Dog Is Ready to Mate: Vet Approved Guide

9 Signs a Dog Is Ready to Mate: Vet Approved Guide

Choosing to breed your dog is a big decision. It can have health consequences for your pup, whether or not it was planned. Epidemiological data show a prevalen…

Chris Dinesen Rogers
By Chris Dinesen Rogers · 2 weeks ago
When Is the Best Age to Breed Dogs (for Females & Males)?

When Is the Best Age to Breed Dogs (for Females & Males)?

When it comes to breeding dogs, timing is everything. Whether you’re timing your dog’s first pregnancy or timing breeding, you’re going to spend a great deal o…

Kristin Hitchcock
By Kristin Hitchcock · 2 weeks ago
June 17, 2026

At What Age Can Dogs Get Pregnant: Vet-Reviewed Facts & FAQ

Dogs reach sexual maturity at different ages, depending on their size (usually). Larger dogs take longer to grow and often reach sexual maturity later than sma…

Kristin Hitchcock
By Kristin Hitchcock
At What Age Can Dogs Get Pregnant: Vet-Reviewed Facts & FAQ
June 17, 2026

How to Tell If a Dog Is Fit for Breeding: 3 Signs to Look For

Breeding your dog and having adorable puppies running around is a real joy and a wonderful experience for children. That said, it is also a massive responsibil…

Nicole Cosgrove
By Nicole Cosgrove
How to Tell If a Dog Is Fit for Breeding: 3 Signs to Look For
June 17, 2026

How Long Will It Take for Dogs to Mate? Mating Process & Considerations

If you are breeding your dog for the first time, you may have some questions about the breeding process. Fortunately, dogs usually know what they need to do. H…

Nicole Cosgrove
By Nicole Cosgrove
How Long Will It Take for Dogs to Mate? Mating Process & Considerations
June 17, 2026

Dog Heat Cycle: Vet-Verified Signs, Frequency & Facts

Understanding your dog’s heat cycle (or estrus cycle) is paramount if you have an unspayed female at home. Without learning how it works, it is impossible to k…

Kristin Hitchcock
By Kristin Hitchcock
Dog Heat Cycle: Vet-Verified Signs, Frequency & Facts
June 17, 2026

How to Get Dogs Unstuck After Mating? 2 Vet-Reviewed Methods

If you're an inexperienced dog owner or new to breeding dogs, it can be concerning when your dog finds themselves stuck while mating. This process, called a "t…

Oliver Jones
By Oliver Jones
How to Get Dogs Unstuck After Mating? 2 Vet-Reviewed Methods
June 17, 2026

Proestrus and Estrus Phases in the Dam Cycle in Dogs: Signs & Tips

Canine estrous cycles, or reproductive heat cycles, are stages your dam goes through during fertile years. The process has four distinct stages, which include…

Ashley Bates
By Ashley Bates
Proestrus and Estrus Phases in the Dam Cycle in Dogs: Signs & Tips
June 17, 2026

What Is Dog Mismating? Vet-Reviewed Facts & Tips

Dogs are fun, intelligent creatures that many people enjoy spending their lives with. However, overbreeding and mismating can result in unwanted animals that e…

Rachael Gerkensmeyer
By Rachael Gerkensmeyer
What Is Dog Mismating? Vet-Reviewed Facts & Tips
June 17, 2026

Dogs in Heat: 10 Vet-Verified Facts

Canine estrous, simply known as “heat”, is a reproductive cycle that female dogs go through when they reach sexual maturity. This cycle is often compared to me…

Sarah Psaradelis
By Sarah Psaradelis
Dogs in Heat: 10 Vet-Verified Facts

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.

You may opt-out at any time. View our Privacy Policy for more information.

The Dogster app on a phone