Water and hydration
How much water should a pregnant dog drink?
Last updated 23 September 2026 · How we write and check this
Short answer
A pregnant dog's water needs rise gradually through pregnancy and increase sharply once nursing begins, often reaching 1.5 to 2 times her normal intake while producing milk. During pregnancy itself, before whelping, a modest increase of around 10 to 20 percent above her usual amount is typical as her body supports the growing litter.
Water needs during pregnancy itself
In the first weeks of pregnancy, water needs change very little, but from around week 5 onward, as the puppies grow rapidly and the mother's blood volume increases, thirst typically rises noticeably. A dog normally drinking 700 ml a day might move toward 800 to 900 ml by the final weeks.
Why nursing changes things dramatically
Milk is mostly water, so a nursing mother producing milk for a litter of five or six puppies can need close to double her pre-pregnancy water intake, especially in the first three to four weeks of lactation when milk production peaks.
Making sure she has enough
Keep at least two full water bowls within easy reach of the whelping area, since a nursing mother often does not want to leave her puppies for long to find water elsewhere. Check bowls several times a day rather than relying on a single morning fill.
Key takeaways
- Water needs rise modestly during pregnancy and sharply during nursing.
- A nursing mother can need close to double her normal water intake.
- Milk production peaks in the first three to four weeks after whelping.
- Placing water close to the whelping area encourages a nursing mother to drink enough.