How to Breed Rabbits: Breeding Age, Pairing, Nest Box, and Kindling

To breed rabbits, wait until the doe is old and grown enough for her breed, carry her to the buck’s pen (never the other way around), watch the mating, and write down the date. From that date, the nest box goes in on day 28, the litter usually arrives around day 31, and your job during kindling is mostly to stay out of the way. Everything in this guide hangs off that one recorded date, which is why the free rabbit gestation calculator and a breeding record on the doe’s Creatures profile are worth setting up before the first pairing, not after.

Before any of that, settle the harder question. Rabbits breed fast, and a single doe can produce a lot of kits in a year, each of whom needs a home, a correct sex check, and eight weeks with the family before they go anywhere. If you cannot house or place every kit a litter might bring, do not breed. This guide is about the practice of breeding: readiness and ages, pairing, the nest box and kindling, the first days with kits, rebreeding, and records. The pregnancy itself (gestation length, due dates, palpation, and false pregnancy) has its own guide, how long are rabbits pregnant.

Rabbit breeding timeline, day by day

This is the whole cycle from pairing to kits leaving home, counted from the mating date (day 0). The day numbers are typical figures from the Merck Veterinary Manual and university extension guides cited below, not promises: a doe is an individual, and a small litter often runs a day or two longer. For your own dates, enter the mating day in the rabbit gestation calculator, which lays out the kindling window with no account needed.

Sources for the timeline: gestation, palpation day, nest box day, fur pulling, eyes opening and the pet and show rebreeding interval are from the Merck Veterinary Manual’s rabbit management chapter; the second-mating window is from Michigan State University Extension’s 4-H breeding bulletin; kits leaving the box at about three weeks is from the Texas A&M AgriLife 4-H Rabbit Project Reference Manual; the eight-week minimum for new homes is covered in our baby rabbit care guide.

Before you breed: the rabbits, the space, and the plan

Good litters start weeks before the pairing, with three checks.

The does and bucks are fit, not fat. Michigan State University Extension says most does that fail to conceive are too fat or have been out of production a long time, and that fat bucks tend to be lazy breeders; it asks for breeding stock kept “trim, active and healthy” (MSU Extension). Check both rabbits for injury and illness first, including teeth, feet and any nasal discharge. If you are not sure what healthy weight looks like for your breed, the rabbit weights by breed guide has body condition pointers, and a rabbit-savvy vet can check a doe you are unsure about.

The housing is ready for a family. The doe needs a roomy pen with a solid floor, not bare wire, which causes sore hocks, and space for a nest box on top of her normal hide, litter area, hay and water. Our rabbit housing guide covers the setup. Kits will be in that space for eight weeks, so plan for the doe plus a litter of young rabbits, not one adult.

Heat and daylight are on your side. Rabbits breed less readily in late summer, fall and early winter. MSU Extension notes that bucks exposed to temperatures over 85°F for five days in a row can become temporarily sterile, and older bucks can stay sterile for 60 to 90 days afterward (MSU Extension). Utah State University Extension recommends 14 to 16 hours of light a day for better breeding results (USU Extension). Keep the buck in the coolest part of your rabbitry, and see keeping rabbits cool before a summer litter, because heat is hard on a heavily pregnant doe too.

You know where the kits are going. Decide before the pairing: which kits you will keep, who is waiting for the rest, and what happens to any you cannot place. Many breeders only pair a doe once they have a waiting list, and you can open your rabbitry to applications and run a waitlist on Creatures so the names are in one place.

How old do rabbits have to be to breed?

Old enough to be grown, not just old enough to conceive. Rabbits reach sexual maturity well before they finish growing, and the gap is biggest in the giant breeds. The Merck Veterinary Manual puts sexual maturity at about 3.5 to 4 months for small breeds such as the Polish Dwarf and Dutch, 4 to 4.5 months for medium breeds, and 6 to 9 months for giant breeds (Merck). A doe that can get pregnant at that age should usually wait a while longer.

The first-breeding ranges combine three sources that differ slightly. MSU Extension says small breeds such as the Polish can be bred at 4 to 5 months, medium breeds such as New Zealands and Californians at 6 to 7 months, and giant breeds such as the Flemish Giant at no less than 7 months (MSU Extension). The Texas A&M 4-H manual is a little more conservative: 5 to 6 months for small breeds, 6.5 to 7 months for medium breeds, 8 to 9 months for giants, “depending on development” (Texas A&M AgriLife). A review of rabbit reproduction in the journal Clinical Theriogenology, by veterinarians at Iowa State and the University of Illinois, suggests waiting until at least 9 to 12 months for the large breeds, and gives the best single rule of thumb: delay a doe’s first mating until she has reached at least 80 percent of her mature body weight (Sathe and Shipley, Clinical Theriogenology 2013). The same review says bucks should usually start about a month later than does, since males mature more slowly, and the Texas A&M manual advises against using any buck under 6 months.

So weigh her. If your Flemish Giant doe is 8 months old but still well short of adult weight, give her more time. A Polish doe of 5 months who is fully grown and in good condition is a reasonable candidate.

Is there an upper age? There is no single cutoff, and sources frame it as condition and results rather than birthdays. What changes with age is risk: the Clinical Theriogenology review notes that uterine adenocarcinoma, the most common reproductive tumor in rabbits, is strongly age-related, and in some breeds (it names Tan, French Silver, Havana and Dutch) affects 50 to 80 percent of does over four years old (Sathe and Shipley). Early signs in a breeding doe include smaller litters, falling fertility and more stillbirths. A doe whose litters are shrinking, or who loses condition from one litter to the next, is telling you it is time to retire her; talk to your vet about spaying her when she retires, as covered in our guide to spaying and neutering rabbits.

Choosing the pair

A pairing is a decision about the kits’ health and type, not only about whether two rabbits will mate. Before you pair a doe:

• Check the pedigrees. Mississippi State University Extension’s rabbit production guide says bucks and does in a breeding program “should not be closely related,” and it lays out a buck rotation designed to keep inbreeding down (Mississippi State University). Line breeding is a deliberate tool some show breeders use, but pairing close relatives by accident concentrates faults along with virtues; our guide to the coefficient of inbreeding explains how to measure how related a planned pair is and how linebreeding differs from inbreeding (its examples use dogs, but the math is the same for rabbits). Put the doe’s and buck’s ancestors side by side before you decide; the free rabbit pedigree chart maker builds a three-generation chart for each without an account, and our guide to the rabbit pedigree explains what ARBA requires on one.
• Match the goal. If you show, pair against your breed standard; our rabbit shows guide explains how judging and legs work. For pet litters, temperament and health come first. If you are still settling on a breed to work with, the Creatures rabbit species page lays out the breeds side by side.
• Sex both rabbits for certain. A surprise “doe” who turns out to be a buck is how most accidental litters start. Our rabbit sexing guide shows how to check.

How to breed rabbits: the pairing, step by step

Rabbits do not have a heat cycle to wait for. They are induced ovulators: mating triggers ovulation, about 10 to 11 hours later (Sathe and Shipley). They do have a rhythm of willingness, though. Merck says does are receptive about 14 of every 16 days, and most receptive when the vulva is red and moist (Merck). MSU Extension adds that a receptive doe often acts restless, rubs her chin on feeders and equipment, and seeks out other rabbits, while a small, pale, dry vulva means she is not ready (MSU Extension).

1. Carry the doe to the buck’s pen. Merck, MSU, Mississippi State and Penn State all give the same rule: the doe always goes to the buck, never the reverse (Penn State Extension). Does defend their own space and may attack a buck put in with them, and a buck in a strange pen tends to spend his time sniffing around instead of breeding.
2. Stay and watch. With a receptive doe and an experienced buck, mating happens within moments, and when it is complete the buck usually falls to his side, sometimes with a short cry. Do not leave the pair alone. The Clinical Theriogenology review says they should not be left unattended for longer than a few minutes, because injuries happen (Sathe and Shipley), and Mississippi State warns against leaving them together “even an hour” to solve a mating problem.
3. Consider a second mating. Some breeders allow two matings before taking the doe home; others bring her back to the same buck, or a different one, 8 to 12 hours later (MSU Extension). If you use two bucks, you will not know which sired the litter, which matters for a pedigree.
4. If she refuses, do not force it. Take her home and try again in 2 to 4 days, or try a different buck (MSU Extension). A doe who repeatedly refuses may be too fat, out of condition, in a false pregnancy, or feeling the season.
5. Write down the date and the buck, right away. That is day 0, and every later date depends on it. Doing it on the doe’s profile, rather than on a card taped to the pen, means the date is still there when three does are due in the same week.

Test mating, putting the doe back with the buck 10 to 16 days later to see whether she refuses, is not a reliable pregnancy test. Merck calls the practice unreliable, and the Clinical Theriogenology review explains why: some pregnant does accept the buck, and some open does refuse him. Palpation at about day 12 is the better check; how it works, what a false pregnancy looks like, and why a doe can nest with no kits coming are all in our guide to how long rabbits are pregnant.

The rabbit nest box: when to put it in, what size, and how to fill it

The nest box is where the litter lives for its first three weeks, so it has one job: keep newborn kits warm, dry and together, with the doe able to hop in and out easily.

When: day 28. Merck says to add the nest box 28 to 29 days after breeding, and Penn State and Mississippi State both say day 28 (Merck; Penn State Extension). That gives the doe a few days to build before a day-31 kindling. Put it in too soon and, as Merck puts it, does foul the nest with urine and feces, which leaves you with a soiled box just when the litter needs a clean one. Put it in late and a doe may kindle on the pen floor, where kits get cold fast. A reminder on the doe’s profile for day 28 is the simplest way to get it right.

Size: big enough for the doe to turn, small enough to keep kits together. Extension guides give a range rather than one number:

• Mississippi State describes an open-top plywood box of 12 by 18 inches and 10 inches tall as working well for a medium doe (Mississippi State University).
• The Texas A&M 4-H manual gives 16 by 10 inches and 8 inches tall for an open box (Texas A&M AgriLife).
• Penn State adds the principle behind both: the box should be small enough to keep the litter close together.

Scale down for dwarf breeds and up for giants. The sides should be high enough that newborn kits cannot tumble out, with an entry lip low enough for a heavily pregnant doe to use comfortably.

Construction: a solid bottom, and never cardboard. Mississippi State says wire bottoms are not practical because the doe burrows to the bottom of the box to kindle, and wire is not warm enough in winter and exposes the young to cold. Use a solid, removable bottom that you can clean. The Texas A&M manual says never to use a cardboard box for a nest box, and to clean and disinfect nest boxes before each kindling and again after removing them.

Filling: two thirds full, or packed in winter. Mississippi State says to fill the box about two thirds full with clean hay or straw. In cold weather, the Texas A&M manual suggests packing it completely so the doe has to burrow a cavity into it, and Penn State adds that straw or wood shavings as bedding helps in cold weather. Utah State University Extension advises against sawdust (USU Extension). Once the box is in place, do not move it; Mississippi State lists moving the box after kindling as one cause of a doe disturbing or harming her litter.

Fur pulling is a good sign. A day or two before kindling, the doe pulls fur from her body and builds it into the nest (Merck); the Clinical Theriogenology review notes it comes mainly from her dewlap and the area around her mammary glands. That fur is the insulation newborn kits depend on, since they are born naked, blind and deaf. A doe who has not pulled fur by the time she kindles, which is more common with first litters, may need help: Mississippi State suggests adding clean fur saved from another doe’s nest, especially in cold weather.

When to take it out. Kits start climbing out of the box at about three weeks old (Texas A&M), and Penn State gives a window of 5 to 21 days after birth for removing it. Most keepers leave it in until the kits are coming and going on their own, and change any bedding that gets wet or soiled in the meantime.

Rabbit kindling: what to expect and what to do

Kindling is the rabbit word for giving birth. It usually happens in the early morning, is over in about 30 minutes, and the kits arrive every one to five minutes (Sathe and Shipley). Most breeders never see it. You wake up to a nest that is suddenly moving under the fur.

What helps a doe kindle well is mostly what you do not do:

• Keep things quiet. Mississippi State lists unusual noises, strange dogs, predators and unfamiliar people among the causes of a doe injuring her young, and notes that a nervous doe may stamp and trample the nest (Mississippi State University). Keep pets and visitors away from the doe for a few days either side of her due date.
• Keep the buck out. Merck notes a doe can conceive again 24 hours after kindling. If the buck is anywhere he can reach her, move him before day 28.
• Keep her fed and watered. Just before kindling a doe may eat little, so make sure she always has fresh water (Texas A&M), and keep hay in front of her. A doe that stops eating near her due date needs a vet, not a wait-and-see.

When it is not going to plan. If there are no kits by day 32, if the doe is straining or clearly distressed without producing kits, or if she kindles and then seems unwell, call a rabbit-savvy veterinarian the same day. Merck is blunt that a doe who has not kindled by day 32 needs veterinary intervention, because otherwise “a dead litter is almost always delivered sometime after day 34.” The warning signs and the reasons behind them are laid out in the call-a-vet section of our rabbit pregnancy guide. Do not try to treat or assist a doe yourself.

Some does, most often first-timers, kindle on the floor or scatter kits outside the box. Gently gather any kits back into the fur in the center of the nest, warming any that feel cool against your body first, and tell your vet if any seem cold or weak. It is common for does to eat the placenta, and sometimes a dead kit, after kindling (Sathe and Shipley). First-litter does are often very nervous, and Mississippi State advises giving a doe one more chance if she harms a first litter; a repeated pattern, not a single event, is what should make you reconsider breeding her.

The first days with kits

The first check. Once the doe has settled, usually within 24 to 48 hours, do one quick, calm check: count the kits, confirm they are warm and in a heap, and remove any that were stillborn (Penn State Extension). The Texas A&M manual suggests distracting the doe with some feed first so she is not standing over the box. Put the nest back exactly as you found it. Brief, gentle checks like this are standard practice in the extension guides, and the old worry that a doe rejects kits you have touched is largely overblown for domestic rabbits; just keep it short and calm.

Nursing is short and rare, and that is normal. Merck says does nurse only once or twice a day, and kits nurse for less than 3 minutes (Merck). The doe spends the rest of the day away from the nest, which is exactly how a prey animal keeps predators from finding her babies. People who watch for hours, never see her go near them, and decide the kits are abandoned are making the most common mistake in rabbit breeding. Check the kits instead of watching the doe: fed kits have round, full bellies and lie quietly in a warm heap, while kits that are thin, wrinkled, cold or crying need a call to your vet. Our baby rabbit care guide covers the daily check in detail.

Milestones to expect. Kits begin to show hair on day 2 or 3, and their eyes and ears are open by about day 10 (Merck). At about three weeks they start leaving the box and nibbling hay and pellets beside their mother (Texas A&M). A nursing doe needs more food than a doe at maintenance, so let her eat well once she has kindled; the rabbit diet guide covers hay, pellets and greens for a nursing doe and growing kits.

Fostering. If you have more than one doe, breed two on the same day or within a few days of each other. MSU Extension recommends exactly this, because litters born together make fostering possible if one doe has more kits than she can feed or loses her milk (MSU Extension). The Texas A&M manual says to move surplus kits only to a doe with a small litter of the same age and size.

Weaning and new homes. Merck gives about 4 to 5 weeks as the weaning age in rabbitries, but for pet and show litters a slower handover is the kinder and safer course, with kits staying with their mother and littermates until at least 8 weeks before going to new homes. The details, including why early weaning is risky for a kit’s gut, are in the baby rabbit care guide. Sex every kit before it leaves, and separate the young bucks from their sisters and mother in good time, since small breeds can be sexually mature at three and a half months.

How soon can you rebreed a rabbit after kindling?

Physically, almost immediately: Merck notes a doe can conceive 24 hours after kindling. Whether she should is a different question, and for most people the answer is no.

• Pet and show rabbits: about 35 to 42 days after kindling. Merck says most people raising rabbits for show or home use rebreed 35 to 42 days after the birth (Merck). MSU Extension recommends a 35-day breed-back for anyone starting out, and Utah State University Extension says a 35-day interval between litters is advised for the best results (USU Extension).
• Shorter schedules are commercial meat practice. Commercial producers may breed back 14 or 21 days after kindling, but MSU Extension warns that intensive programs increase the number of does culled for “burn out,” and says not to rebreed a doe in poor condition or one nursing a large litter at 21 days. The Clinical Theriogenology review goes further: does with large litters that are milking heavily should not be bred until the kits are weaned.
• Limit litters per year. The Texas A&M 4-H manual says a doe should produce only four litters per year. Condition is the real guide. A doe who is losing weight, looking tired, or producing smaller litters needs a longer rest, and possibly retirement.

A pregnancy that “did not take” is the other rebreeding question. If palpation at day 12 finds no embryos, most breeders take the doe back to the buck rather than waiting out the month; see how long are rabbits pregnant for the palpation details and the false-pregnancy window, when a doe will often refuse.

Rabbit breeding records: what to write down

Good records are how you learn which does raise big healthy litters, which bucks’ matings take, and which pairings to repeat. Mississippi State’s list of basic breeding records is a good minimum: date bred and buck used, kindling date and number born alive and dead, and number and weight of kits at weaning (Mississippi State University). Penn State recommends a tattoo or ear tag for every rabbit and an identification card with its health and breeding information (Penn State Extension). A fuller record adds:

• palpation date and result, and any false pregnancies;
• nest box date and whether the doe pulled fur and used the box;
• litter weights at a few set ages, not just weaning;
• kits fostered in or out, and any losses with the likely cause;
• rebreeding date and the doe’s condition at the time;
• where each kit went, with its sex, color, and ear number or tattoo.

Doing this on Creatures. Start with the doe’s free profile. From it, add a Breeding & Reproduction record, turn on tracking as a breeding cycle, and pick the buck (from your own rabbits, or by name if he lives elsewhere). Enter a single date for an observed mating, or a start and end date if they were together for a stretch. Creatures projects the kindling window, shows the cycle on the doe’s Breeding tab, and puts her on the Breeding dashboard under Expecting, Due soon and Overdue. If palpation changes the picture, adjust the projection rather than starting over, as explained in tracking pregnancy and progress. When the litter arrives, record the birth and create the litter: Creatures closes the cycle, groups the kits, and lets you give each kit its own profile when you are ready, with the dam linked, and the sire too when you picked his profile, so its pedigree starts building itself. When a kit goes to a new home, the free rabbit pedigree chart maker prints its pedigree, and if buyers have reserved kits, you can share pregnancy updates with them without making the doe’s records public.

If you keep more than rabbits, our sister guide to livestock record keeping covers the same habits across species.

Frequently asked questions

How old do rabbits have to be to breed?
Small breeds at about 4 to 6 months, medium breeds at about 6 to 7 months, and giant breeds at about 8 to 12 months, depending on the source and on how grown the rabbit is. A good rule is to wait until a doe is at least 80 percent of her adult weight. Bucks usually start about a month later than does.

Do you put the male rabbit in with the female, or the female in with the male?
Always take the doe to the buck’s pen. Does defend their own space and may attack a buck put into it, while a buck in a strange pen tends to explore instead of breed. Stay and watch, and take her home afterward.

How do you know if rabbits mated successfully?
At the end of a successful mating the buck usually falls to his side, sometimes with a short cry. The only good way to know she is pregnant is palpation at about 12 days, done or taught by someone experienced; refusing the buck later is not a reliable sign.

When do you put the nest box in for a pregnant rabbit?
On day 28 after mating, a few days before the expected kindling around day 31. Much earlier and she may soil it; much later and she may kindle on the floor.

How big should a rabbit nest box be?
Big enough for the doe to turn around, small enough to keep the kits together. Extension guides describe boxes of about 12 by 18 by 10 inches and 16 by 10 by 8 inches for medium breeds; scale down for dwarfs and up for giants. Use a solid, cleanable bottom, not wire and not cardboard.

How many babies does a rabbit have?
It depends on breed and doe. The Clinical Theriogenology review gives fewer than four for some small breeds and eight to ten in larger breeds such as the New Zealand White and Flemish Giant.

Should the buck stay with the doe after she gives birth?
No. A doe can conceive again within 24 hours of kindling, so move the buck away before the nest box goes in on day 28.

How soon can I breed my rabbit again after she has babies?
For pet and show rabbits, about 35 to 42 days after kindling, and only if she is in good condition. Limit her to a few litters a year.

Do this next on Creatures

You have a doe, a plan and a date to count from. These are the useful next steps, in the order most breeders need them. More on rabbits in general is on the Creatures rabbit page.