How do puppies distinguish between male and female?

To identify the sex of a dog, follow these steps:

First turn the dog upside down, belly up;

Look at the middle and lower part of the dog's stomach; See if there are protruding organs in the middle and lower part of the dog's stomach. If so, see if there are spherical organs in the lower part of the stomach, and some are handsome guys;

If there is a spherical organ in the lowest part of the dog's stomach, if not, it is a beauty.

Extended data:

Epidemic prevention and insect repellent:

Before taking the puppy home, be sure to confirm the date of birth, the date of the first vaccination and the date of the first deworming with the original owner, and make detailed records!

Note: If you can't prove or be sure that the original owner has vaccinated the puppy, you can wait until the dog fully adapts to your home environment 15 days after returning home, take it to a trusted pet hospital for examination, and you can reschedule the vaccination period yourself, so as to better ensure the dog's health!

The first dose should be given on the day when the puppy is 45 years old. The vaccine is

The second dose was injected at 75 days old.

The third dose was injected with Liuhe 1+ rabies vaccine at the age of 105.

Note: Six-in-one vaccine includes the following preventive diseases: canine fever, adenovirus type II, parainfluenza, canine parvovirus, infectious hepatitis and leptospira.