So I have 2 baby rats and one older right now the babies are quarantining . when they are down their introduction stage and come together to live in the same cage and they both need to eat different food so the adult food and the baby food how do I separate them from eating each other's...

I got 2 new rats recently and one of them are quite scared so they hid in the tube a lot and I don’t know if it’s drinking anything. Any tips?