Summary: Male and female puppies differ in the obvious way that males have a penis and females have a vagina, but they generally have similar temperaments depending on the breed and how the puppy is raised. Find out how some male dogs may be more territorial with information from a professional dog trainer in this free video on puppies.
Heidi Dixner is the owner of Red Rover Pet Services in Nashville, Tenn. She has worked with poodles for nearly 30 years, and she actively participates in breed rescue. Dixner has been...read more
"What is the difference between a male and a female puppy. It's pretty obvious. Male puppies have a very clear penis that actually travels from in between their legs along their belly. It's very easy to see. Females have a much smaller vulva area that's just between their legs so it's very obvious. Male puppies and female puppies will both squat to urinate initially so there won't be any difference there. Sometimes male dogs are even neutered at a point before they start lifting their leg to marking and they may go many years without lifting their leg to mark. So temperament wise it really depends on the individual dog, male puppies can be a little bit more territorial but female puppies can too. So try to put that out of your mind and deal with the individual dog that you have. Certainly some people prefer male to female dogs in the relationship that they believe they have with those. So that's up to individual and personal preference."
eHow Article: Male vs. Female Puppies