The most important difference between male and female dogs is the genitalia, male dogs have a penis bone compared to female dogs, while the location of urination female dogs are under the anus, while male dogs are under the belly. Male dogs will have a pubic bone at birth, a urethral opening under the belly, and testicles in adulthood. The male dog’s genitals are very close to the navel and far from the anus, almost on the belly; while the female dog’s genitals are very close to the anus, just below the anus, not close to the navel, and the female dog’s little boobies are clearly scattered on the belly. This method is the most reliable. The male dog’s genitals are mostly round and in the middle of the belly; the female dog’s genitals are triangular and below the anus.
