Veterinary & Aquatic Services Department, Drs.
Foster & Smith, Inc.
Q. How do I distinguish between
a male and female puppy?
A. It is much easier to
determine the sex of a newborn puppy than kitten. The scrotum in the male
dog is located below the anus almost between the back legs. The testicles
are enclosed in the scrotum by about 8 weeks of age. The penis in the dog
is directed forward and lies on the back half of the ventral abdomen (belly).
It is enclosed within the prepuce. The dog's penis does contain a bone known
as the os penis. When examining newborn puppies for sex, do not mistake
the umbilical cord for the prepuce and penis. The female puppy has a slit-like
vulva located below the anus almost between her rear legs.