Second trimester · Days 29–35

Week 5 of dog pregnancy: organs form

The embryos become recognizable fetuses as eyes, claws, whiskers and palate form.

Updated October 2026 · Information only, not veterinary advice

What you may notice

Start moving her gradually to a high-quality puppy or growth diet, increasing portions in small steps over the next weeks.

Start moving her gradually to a high-quality puppy or growth diet, mixing it in over about a week. Ask your vet how much to feed.

Discuss diet and any health concerns at this point.

Questions

When do I switch a pregnant dog to puppy food?

Most vets suggest around week five, changing gradually over several days to avoid stomach upset.

Should I give a calcium supplement?

No, not unless your vet says so. Extra calcium during pregnancy can raise the risk of low blood calcium (eclampsia) after whelping.

Keep reading

Enter a date and see her current day, week and what to expect now.

Day-by-day dates for vet visits, X-ray, setup and temperature checks.

What happens, what to feed and when to see the vet, weeks 1 to 9.