t something that takes place overnight, a few weeks before the
puppies, if there were
puppies, were to be born, the female sheds so that the
puppies have easy access to her nipples. By the time her coat comes back in fully, it's time for her to come into season again, and the pattern continues. If you were to have her spayed, you could knock the shedding down to once a year, though, either spring or fall, but spayed females normally "blow coat" only once a year, as do males.