Kangaroos can produce two different types of breast milk simultaneously.

Baby kangaroos, also called joeys, spend their first several months attached to a teat inside their mother's pouch. After it leaves the pouch, it typical will continue to drink its mother's milk until it is over a year old!

If the mother gives birth to another child, an amazing phenomenon occurs - one teat will produce a milk that is high in carbohydrates for the older joey, and the other produces a fattier milk for the newborn. This allows mother kangaroos to care for up to three offspring at once - an older joey outside the pouch, a younger one attached to a teat in her pouch, and an unborn joey inside her womb!