Physical differences between male and female dogs Differences between the two sexes within a species other than the appearance of their sex organs are called “sexual dimorphism.” Size, color, and markings are often the most distinctive secondary sexual characteristics. Sexual dimorphism is common in birds (think the differences between male and female peacocks), insects, and plants, and in dogs, it’s more common in some dog breeds than others. According to Dr. Vet. By Bonnie V. G Beaver The physical differences between male and female dogs begin in the womb. Male dogs experience a surge in testosterone, producing masculine characteristics. Therefore, puppies that do not receive this increase are female. In young puppies, sexually dimorphic differences are extremely minor; however, once puberty sets in, these differences tend to become more apparent. That is, after all, what occurs with humans, right? How often do baby girls and boys get confused for each other? Let’s now examine four typical physical distinctions between male and female dogs.
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