4 Week Pregnant Dog Nipples

When it comes to a canine pregnancy, one of the first physical signs that a dog is expecting is the development of swollen and enlarged nipples. This typically occurs within the first four weeks of pregnancy, and is known as “pinking up.”

As the dog’s hormones begin to change, the mammary glands in her nipples will start to produce milk and prepare for lactation. The nipples will appear larger and may become more sensitive to the touch. This is a normal and expected change, and is not cause for concern.

Not all dogs will experience visible changes in their nipples during this early stage of pregnancy. Some may not show any signs of enlargement until later on in the pregnancy. Additionally, some non-pregnant dogs may also experience temporary nipple enlargement due to hormonal fluctuations.

During the first four weeks of pregnancy, it’s important to monitor your dog’s overall health and behavior. She may become more lethargic and have a decreased appetite, or she may become more affectionate and attentive to her owners. This can vary from dog to dog.

Make sure your dog is receiving proper nutrition during this time. Pregnant dogs have increased nutritional needs, and it’s important to consult with your veterinarian to ensure she is getting the proper balance of vitamins and minerals.

As your dog’s pregnancy progresses, her nipples will continue to change and prepare for lactation. In the later stages of pregnancy, the nipples will become even more swollen and may even leak colostrum, the first milk produced by the mammary glands.

Overall, the development of swollen and enlarged nipples is a normal and expected sign of canine pregnancy within the first four weeks. It’s important to monitor your dog’s overall health and behavior, and make sure she is receiving proper nutrition. Consult with your veterinarian if you have any concerns or questions.


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.

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