Can a female dog leak milk out of her nipples three weeks be for she has puppies?

Yes, a female dog can leak milk from her nipples a few weeks before giving birth. This is often a sign that her body is preparing for lactation in anticipation of the puppies. However, not all dogs will exhibit this behavior, and the timing can vary. If you have concerns about your dog's health or pregnancy, it's best to consult a veterinarian.