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

siberian husky and puppies

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 of energy timekeeping.

Breeding your female and male at the right ages is essential to a successful and healthy pairing. Age determines when a dog is fertile, though just because a dog is fertile doesn’t mean that they’re ready to breed. Females should be bred after they reach their adult size and males when they reach sexual maturity. This occurs sooner with small breeds and later with larger ones.

That said, breeding females and males too late can result in smaller litters and unhealthier puppies.

In this article, we help you figure out which ages are best to breed your canine.

divider single dog paw oct 2024

Best Age to Breed Female Dogs

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

The best age to breed a female largely depends on their breed. Some breeds are ready to be bred sooner than others. Typically, smaller dogs can be bred earlier than larger dogs. The faster that a breed reaches adult size, the sooner it’ll be ready to breed.

Females should be bred later than males. They have to carry a litter and take care of the puppies, which is a far bigger strain than what the males have to deal with.

Females should be bred after they reach their adult size. Most will go into heat before they’re fully grown, technically making them fertile. However, if they are bred too young, their nutritional needs will be substantially high, and problems are more likely.

You want your female to be fully grown before she attempts to carry and give birth to puppies. Most breeders recommend waiting until the female is at least 18 months before breeding. Most breeds are fully grown at this point, limiting the chance of complications.

Many very small breeds can be bred after a year, though. Shih Tzus and similar tiny dogs often reach full size around 6–9 months. By a year of age, these breeds are more than ready for their first litter. Extremely large dogs may need to wait until closer to 2 years of age. Again, you want your dog to be fully grown before breeding. Whenever that is for your dog is when she is ready to breed.

Most females experience sharp fertility declines after 5 years of age. To some extent, this does depend on the breed. Larger dogs usually experience declines sooner than younger dogs, which also tend to have much longer lifespans.

Typically, there are signs of fertility decline. A lower number of puppies in a litter is a clear sign that the female’s fertility is declining. Sometimes, her heat cycles will decline in number.

Related Read: Dog Pregnancy: Vet-Reviewed Signs, Care & Potential Risks

divider dog paws 3 oct 2024

Best Age to Breed a Male Dog

When determining when to breed a male dog, things are much less complicated. You don’t have to worry about the potential health risks to the male quite as much because he isn’t the one actually carrying the litter.

Male dogs usually reach sexual maturity before their female counterparts. Smaller breeds may reach sexual maturity at around 5 months. However, very large breeds sometimes don’t reach sexual maturity until closer to 2 years of age. Just like with females, the breed of the male matters substantially.

Once a male reaches sexual maturity, you can technically mate him every day of the week. However, this is not recommended, as there is such a thing as too many puppies. If one male is siring most of the puppies, you may run into problems with finding mating partners for those puppies later on.

Tosa inu male dog closeup
Image By: acceptphoto, Shutterstock

Males should be healthy before breeding, as this will affect their fertility. Our dogs are what they eat, so feeding your male extremely high-quality food is essential.

While most males reach sexual maturity quite early, they may not reach their maximum fertility until some months later. It usually takes their body a little bit of time to figure things out. Most males will reach their maximum maturity at around 1 year old.

Male dogs remain fertile for the rest of their life. They often don’t have a decrease in fertility like most female dogs, though there is a point in their lifespan where they simply won’t be able to perform quite as well anymore. In very old age, a dog’s sperm mobility and viability may be affected. These factors can diminish his ability to fertilize eggs, even if he can still perform the act of mating.

Diseases associated with old age like arthritis can also affect a male’s ability to breed. Larger dogs typically have this decline earlier. They have shorter lifespans and usually develop health problems before smaller dogs. Therefore, smaller breeds can often continue breeding for longer than older breeds.

beagle dogs mating
Image By: Sigma_S, Shutterstock

What Age Is Safe to Breed a Female Dog?

Typically, it is safest to wait and breed a female dog when she is fully grown. Not only does this ensure that nutrients won’t be directed away from her growth, but it also ensures that she is large enough to safely deliver the puppies.

What age your female will be fully grown at depends largely on her breed. Larger dogs usually take longer to grow. They need to put on more weight than their smaller counterparts. Smaller dogs reach full size in as little as 9 months. However, it is still often best to wait for at least a year for smaller dogs, since they may need a bit more time to put on extra fat and muscle mass.

For larger dogs, you may want to consider waiting until 2 years for breeding. For extremely large dogs, you may need to wait even longer. Speak with your vet about the exact age at which you can safely breed your dog. Often, this is dependent on your dog’s rate of growth.

You should avoid breeding a dog after about 8 or 9 years. At this point, all dogs are much too old to be bred. However, you should also keep an eye on your dog’s specific body condition. Some dogs need to stop breeding long before this.

Did you know you can talk to a vet online? Click on the image or button below to schedule a call: PangoVet_Mention-in-Content Savings V1


Dogster_Website dividers_v1_Jan 18 2024-03

Conclusion

Both male and female dogs should not be bred until they have reached full size. Until then, they are not physically equipped to breed. Males often won’t develop maximum fertility for some time after they technically reach physical maturity. Early litter can potentially stunt a female’s growth and should be avoided.

You should speak with your vet to get your dog a complete health exam before attempting to breed them. Most importantly, this helps prevent early breeding that may potentially harm your female.

With males, there is often less to worry about. They don’t have to carry the puppies or deliver them. However, they should also be given a complete bill of health to prevent diseases from being transferred during the breeding.


Featured Image Credit: Pixabay

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

7 Best Puppy Toys in 2025 – Reviews & Top Picks

As any dog owner knows, picking out the perfect toy for a young dog can be a little tedious. If it’s too big,...

9 Best Dog Car Seats in 2025 – Reviews & Top Picks

Car seats for dogs are important to keep your pup safe while traveling. Dogs can be distracting. They may jump around or try...

Dachshund Vizsla Mix Breed: Info, Pictures, Care & More

It’s no secret that the Dachshund Vizsla is a mixed breed, a cross between the Dachshund and the Vizsla. Both parents were originally...

Can Dogs Eat Crackers? Vet-Reviewed Facts & FAQ

How great are crackers? Slathered with dip, layered with cheese, or eaten just on their own, they are simple yet delicious snacks. But...

More related

Do Scottish Folds Get Along With Dogs? Introduction & Safety Tips

Scottish Folds are adorably cute with their folded ears and expressive faces. It is no wonder they are an increasingly popular breed among...

Male vs. Female Bull Terrier: Key Differences (With Pictures)

The English Bull Terrier is known for their distinctive look and affectionate nature, not to mention their endless goofy antics. Famous for being...

Can Dog Food Make Your Dog Smell? Vet-Verified Nutrition Facts

For anyone who owns or lives with a dog, it can be unpleasant to have a dog that’s constantly stinky. Some dogs may...

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...

Keep reading

Can Dogs Eat Pastrami? Vet-Reviewed Dietary Guidance

As dog owners, we know that we need to be careful when giving our dogs little treats from our plates. Human foods can be risky for dogs because not everything that we enjoy eating is safe for them. If eating...

Can Dogs Eat_Pastrami

Can Dogs Eat Tomato Sauce? Vet-Verified Risks & Safety Tips

Dogs like to snack on their owners’ leftovers and will even beg for table scraps, which causes many people to worry if tomato sauce is dangerous for canines. While plain tomato sauce is safe for dogs, commercial brands of tomato...

Can Dogs Eat Tomato Sauce

7 Homemade Pupsicle Recipes for Your Dog (Vet Approved)

Almost nothing is better than a cold tasty popsicle on a hot summer day. But why should we be the only ones allowed to eat popsicles? What about dogs? You can definitely make healthy pupsicles and give them to your...

Homemade Pupsicle Recipes for Your Dog

6 Best Dog Foods For Pugs in 2025 – Reviews & Top Picks

One of the oldest and most popular dog breeds, the wrinkled face and curly tail of the Pug are adored worldwide. With their charming personalities and adorable looks (is there anything cuter than a Pug puppy? We think not!), Pugs...

Hungry pug dog with food bowl ready to eat

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

15 Foods With Vitamin E for Dogs: Vet-Approved Options

Vitamin E is an essential vitamin for canines. It is an antioxidant that helps clear free radicals from your dog’s body, supports vision, promotes healthy bone growth, helps the reproductive system function, and supports the immune system. Their food should...

english bulldog eating pumpkin

How Much Does The Farmer’s Dog Food Cost? 2025 Pricing Update

When you want to give your dog food that’s the best of the best, fresh is the way to go. But we all know that fresh food costs more than traditional kibble. So, how much does a food like The...

Finny with the farmer's dog food

10 Best Senior Dog Foods for Sensitive Stomachs in 2025 [Vet Approved Reviews]

If you are in search of the right food for your senior pal that suffers from a sensitive stomach, it can be challenging to narrow down the choices. Foods that are geared toward dogs with sensitive stomachs aren’t always a...

senior dog eating canned food on a saucer