When does a pregnant dog start showing?

Most dogs don't show much until weeks 5–6, when the belly rounds and the nipples enlarge. Dogs with big litters can show earlier, and dogs with small litters (or lots of coat) may barely look pregnant until week 7 or 8. Because false pregnancy looks similar, an ultrasound is the only way to be sure.

Can you feel puppies moving at 6 weeks?

Sometimes, but usually not. Vets see puppy movement on ultrasound much earlier. At home, most owners first feel gentle movement around weeks 6–7, and some not until week 8. If you press hard to try to feel them, you risk hurting her. Rest a gentle hand on her belly and leave it there.

What happens in the last week of dog pregnancy?

She'll nest, eat less, pant or pace, and may leak a little milk. Her rectal temperature falls below about 99°F (37.2°C), usually 12–24 hours before labor begins. Keep the whelping area quiet and warm, and keep your vet's emergency number handy.

Is a dog's belly supposed to be hard?

A pregnant dog's belly should feel firm but not painfully tight. A hard, swollen belly with pain, retching or a fever needs a vet visit right away.

Dog Pregnancy Week by Week: Signs & Day-63 Calendar

Most dogs show few signs in weeks 1–3, can be confirmed by ultrasound from about day 25, show belly and nipple changes in weeks 5–7, and whelp around day 63, often 12–24 hours after rectal temperature drops below about 99°F (37.2°C).

If you're trying to work out what's normal right now, this guide to dog pregnancy signs week by week walks through the timeline in order. To turn it into real dates, drop your dog's breeding date into our dog pregnancy calculator and follow along with your own calendar.

One quick note: every dog is a little different, and the exact day of ovulation is usually unknown. Treat the weeks below as a guide, not a schedule. If you'd like the full story on why due dates shift, see how long dogs are pregnant.

Dog pregnancy timeline at a glance

Week	Days	What's happening	What you might notice
1	1–7	Eggs fertilized, embryos travel to the uterus	Nothing
2	8–14	Embryos float free in the uterus	Nothing
3	15–21	Embryos attach (implantation)	Maybe slightly less appetite
4	22–28	Embryos develop; heartbeats can be seen on ultrasound near day 25	Mild "morning sickness," clear discharge in some dogs
5	29–35	Puppies start to look like puppies	Appetite returns, first belly changes
6	36–42	Rapid growth, skeletons begin forming	Nipples enlarge, belly rounds out
7	43–49	Skeletons mineralize (X-ray-ready near day 45)	Weight gain, movement you may feel
8	50–56	Puppies grow fast, fur develops	Big belly, bigger appetite, nesting starts
9	57–63	Puppies are ready	Temperature drop, restlessness, whelping

Weeks 1–3: fertilization and implantation (few visible signs)

The first three weeks look like… nothing. Your dog will act normal, eat normally and go on her usual walks. Anyone who tells you they could see pregnancy in week one is guessing.

Some dogs get a little clingier or a little sleepier around week 3. Others lose interest in a meal or two. None of it is reliable, because a dog in heat or a dog with a false pregnancy can act the same way.

Keep routines normal. Keep flea, tick and worming products on a schedule your vet approves, and don't start any new medicine without asking. Our pregnancy guide has more on caring for a pregnant dog.

Weeks 4–5: vet confirmation, appetite changes, first belly changes

This is when things become testable.

Around day 25–30: A vet can usually confirm pregnancy with ultrasound and often see heartbeats. A blood test that looks for the hormone relaxin can also work from roughly this window.
Week 4: Some dogs have mild nausea and eat less for a few days. A small amount of clear or slightly pink mucus discharge is common.
Week 5: Appetite bounces back, and you may see the first hint of a rounder belly, especially in a dog who's carrying several puppies.

A dog can look pregnant in week 5 and not be. False pregnancy is real, so get the ultrasound before you buy the whelping box. Early signs are covered in our dog pregnancy symptoms guide.

Weeks 6–7: nipple and belly growth, puppies moving

Now the changes are easy to spot:

Nipples get larger and pinker, and the fur around them may thin.
Belly rounds out and hangs lower.
Weight climbs steadily. Most dogs gain roughly 15–25% over pregnancy, with most of it in the last three weeks.
Movement: You may feel gentle wriggling in the belly around weeks 6–7. Don't count on feeling puppies at exactly 6 weeks, since many owners don't feel movement until later, and a big or tense belly can hide it.

Around day 45, ask your vet about an X-ray. It's the best way to count puppies, because skeletons show up clearly by then. Knowing the count matters at whelping: if she's still restless after you've counted the last puppy, something's wrong.

Weeks 8–9: nesting, temperature drop and whelping

Your dog is now enormous, a little grumpy and very interested in finding a private spot.

Nesting: Digging, shredding bedding, rearranging blankets.
Appetite: Big during week 8 as she needs extra calories, then drops off in the last day or so.
Puppies: You can often see movement rippling across her belly.
Temperature: From about day 58, take her rectal temperature twice a day. Normal is about 100–102.5°F (37.8–39.2°C). A drop below about 99°F (37.2°C) usually means whelping within 12–24 hours.

Have your vet's number and the nearest 24-hour emergency clinic saved in your phone before day 58.

Printable dog pregnancy calendar (worked example from a breeding date)

Here's a real calendar. Suppose your dog was bred once, on March 10. Count the breeding date as day 0, so day 25 means 25 days after breeding.

Week	Dates	Milestone
1	Mar 11–17	Fertilization
2	Mar 18–24	Embryos in the uterus
3	Mar 25–31	Implantation
4	Apr 1–7	Day 25 = Apr 4: book ultrasound for about this date
5	Apr 8–14	Appetite returns
6	Apr 15–21	Belly and nipples grow
7	Apr 22–28	Day 45 = Apr 24: X-ray to count puppies
8	Apr 29–May 5	Set up the whelping area, start moving to a higher-calorie food (ask your vet)
9	May 6–12	Day 58 = May 7: start temperature checks
Due	May 12 (day 63)	Whelping window: May 7–17

To build your own, count 63 days after the breeding date, then mark ultrasound at day 25, X-ray at day 45 and temperature checks at day 58. Or let the dog gestation calculator do the counting, then print or screenshot it. If you're not sure when she was fertile, the dog heat cycle calculator can help you estimate.

Food needs change across these weeks too. Our dog calorie calculator helps you see how her daily energy needs shift.

When to call your vet

Call your vet the same day if you notice any of these during pregnancy:

Bloody, green, black or foul-smelling discharge at any point before whelping.
Not eating for more than 24–48 hours, vomiting repeatedly or diarrhea.
Fever, collapse, severe lethargy or pale gums.
Whelping problems: strong straining for 30 minutes with no puppy, more than 2 hours between puppies while she's still in labor, or no labor by day 68 from breeding.
Temperature drop with no labor in 24 hours.
Seizures, tremors or stiff, wobbly walking (low calcium can appear late in pregnancy or after whelping).

If it's after hours, go to an emergency vet. Don't wait until morning.