I feed mine naturally dried carrots and sweet potatoes as well as fresh ones. Degus LOVE sweet potatoes in whatever form they are in. Just don't feed too much and make sure all skin is off and they are washed. Also, make sure you have plenty of timothy hay available. Alfalfa is good for them to chew because it usually has more stems. Pet grass is good too. Or just grass from the yard is okay. Just make sure there are no pesticides on it. If you give apple and willow from the yard, make sure it is bug free. I think there is a process you can do to treat wood involving heating it, but I'm not sure. Don't feed any sugar bearing foods. Peanuts and sunflower seeds should only be given as a every once in a blue moon treat because they are high in fat. Mine eat Brisky Degu pellets and they love them.
Because I was born in the South, I'm a Southerner. If I had been born in the North, the West or the Central Plains, I would be just a human being.