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Sexing your chinchilla
On the MALE chinchilla, there is small space between the penis and the anus. See pictures below.
On newborn chinchillas it may be difficult to accurately determine the sex because the genitals are somewhat swollen at birth.
Check the genitals again a few days to a week later so that you know for certain the sex of your kits. This will enable you to plan
the appropriate time for weaning the male kits and separating them from their mother.