Is it normal for your Boston Terrier to have nipple swelling while on heat cycle?

Yes, it is normal for a female Boston Terrier to experience nipple swelling during her heat cycle. This swelling is caused by hormonal changes in her body as she prepares for potential mating and pregnancy. However, if the swelling is accompanied by other concerning symptoms, such as discharge, pain, or behavior changes, it's advisable to consult a veterinarian to rule out any underlying issues.