Pregnant Dog Nipples Week By Week

Pregnancy in dogs is an exciting time for pet owners, but it can also be a bit nerve-wracking. One of the key indicators of a dog’s pregnancy is the development of her nipples, which can change significantly throughout the course of her pregnancy. In this blog post, we will take a closer look at the changes that can occur in a dog’s nipples week by week, so you can better understand what to expect during this special time.

Week 1: During the first week of pregnancy, there may not be any visible changes to your dog’s nipples. However, some dogs may experience a slight enlargement or darkening of the nipples.

Week 2: By the second week, your dog’s nipples may become slightly more swollen and may appear slightly darker in color. This is due to increased blood flow to the area and the beginning of hormonal changes in the body.

Week 3: During the third week, your dog’s nipples may become even more swollen and may have a more pronounced darkening of the color. Some dogs may also develop small bumps or protuberances on the nipples, which are called mammary papillae.

Week 4: By the fourth week, your dog’s nipples will likely be very swollen and may appear quite dark in color. The mammary papillae may also be more prominent at this point. Additionally, the nipples may be more sensitive to touch, and your dog may be more protective of them.

Week 5: During the fifth week, your dog’s nipples will likely be at their most swollen and dark in color. Some dogs may also develop a milky discharge from the nipples, which is called colostrum. Colostrum is a precursor to milk and is very important for the health and development of puppies.

Week 6: By the sixth week, your dog’s nipples may begin to recede slightly in size and the color may start to lighten. The mammary papillae will also likely be less prominent at this point. Additionally, the colostrum may start to change to milk.

Week 7: During the seventh week, your dog’s nipples will likely be much less swollen than they were earlier in the pregnancy. The color will also be less dark, and the mammary papillae will be barely visible. Milk production will also likely be in full swing at this point.

Week 8: By the eighth week, your dog’s nipples will likely be back to their normal size and color. Milk production will continue, and the puppies will start to nurse.

Every dog’s pregnancy and nipple development will be different. Some dogs may experience more or less swelling, darkening, or other changes to their nipples than others. Additionally, some dogs may have more mammary papillae or colostrum than others. However, this guide should give you a general idea of what to expect during your dog’s pregnancy. If you have any concerns or questions, be sure to consult with your veterinarian.


Hannah Elizabeth is an English animal behavior author, having written for several online publications. With a degree in Animal Behaviour and over a decade of practical animal husbandry experience, Hannah's articles cover everything from pet care to wildlife conservation. When she isn't creating content for blog posts, Hannah enjoys long walks with her Rottweiler cross Senna, reading fantasy novels and breeding aquarium shrimp.

Leave a Reply

Your email address will not be published.

Back to Top