I believe that there are few owners who will deliberately observe the color changes of dog nipples, but to a certain extent, the change in dog nipples can also indicate that the dog's physical condition has changed at this time. Regular observat...
I believe that there are few owners who will deliberately observe the color changes of dog nipples, but to a certain extent, the change in dog nipples can also indicate that the dog's physical condition has changed at this time. Regular observation will be helpful for us to determine whether there is any abnormality in the dog.

1. Local stimulation
External factors may stimulate the dog's nipples, just like other parts of the dog. This situation often causes discoloration of one or several nipples. Dogs who like to rub around the carpet or blankets, rubbing may cause trauma to their nipples and cause pain. Licking or scratching due to skin diseases or contact allergies can also lead to local reactions and discoloration of the nipple.
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2. Changes in body hormones
The most common reason for nipples to discolor are hormone changes in unspasted female dogs. If your dog is not spayed, its breasts become red and larger, and its weight gain and abdominal circumference increase, you should consider whether it is pregnant. These changes occur in the second trimester of a dog, usually around 40 days of pregnancy. Be sure to note that fake pregnancy will also have similar symptoms. If you cannot make a good judgment, you need to be sent to the hospital for testing to help you make a judgment.

3. Female dog breastfeeding causes
If the female dog is in the breastfeeding period, the puppy will often suck and bite the nipples, which may cause local stimulation. Moreover, puppies' nails may scratch the nipple, causing bacteria to enter the skin and cause mastitis. Therefore, you should pay more attention to changes in the nipples of your dog, and be sure to pay close attention to swelling, warm, red breast tissue, and other accompanying disease symptoms.
4. Breast tumor
If a dog suffers from a breast tumor, its breasts will become solid and have nodular tumors, which is a common disease in female dogs. When you touch the tumour, you will feel like the particles under the skin. The skin of the breast may have ulcers or infections, the nipples may be swollen, red, and liquid may be discharged. Don’t think that male dogs will not have such diseases. Although the probability is relatively low, they also have the possibility of illness. If you find any abnormal situation and you cannot make a judgment, it is best to go to the hospital for a check-up.