Yes, dog period blood can be dark. During a dog's heat cycle, the vaginal discharge starts off bloody and then gradually becomes more watery and pinkish. However, for some dogs, the discharge may be more yellow in color or can be brown.
This variation in color can be due to several factors, including the individual dog's physiology, the stage of the heat cycle, and even diet.
It's important to note that while dark discharge is usually normal, it's always best to consult your veterinarian if you notice any unusual changes in your dog's vaginal discharge, such as a strong odor, excessive bleeding, or a change in consistency.
