Can mice drink juice? Do you drink takeout or freshly squeezed at home?
There is no need to give them juice, just 1-2 times a week is enough, but the water should be guaranteed every day.
If you want to give them juice, squeeze it yourself (most of it is not natural) and put it in the water fountain. After they drink it, they will immediately pour it out, wash it and change it into boiling water, because the juice is easy to go bad.