Degus can live for as long as nine years, but they can't be kept in captivity alone. Like many animals, they are social creatures that require companionship throughout their lives. Getting a pair is a good start, and if you want to go up from there, do it gradually. Don't just throw in the cage a third degu without proper introduction, or they might go for each other's throat.
When in the wild, degus live in large groups -- similar to how dogs and wolves form their hierarchy. Exploring comes naturally to them, so the intricate underground tunnels aren't a big deal. And if a pathway is taking too long to take one to its destination, it can simply dig a new way.
The only way to determine the sex of your degus is to take a close look. If you're still confused, bring your family of adorable rodents to a vet. Also, remember that giving birth is nothing to these creatures. One can get pregnant again after producing a litter of offspring. Separate them to stop them from multiplying at a ridiculous rate.
Take your pet to your veterinarian Wichita KS for regular health and dental checks.