And yet another eason why you SHOULD NOT purchase rats from the petstore. No wonder the one is sick! They look only about three weeks old or less, they should be with their mommas! And I doubt that you have both females!

My kittens are kept with their mothers until they are four weeks old, males are then seperated so that they do not impregnante the mother or female siblings, does are kept with their mothers until they are at least five weeks old. Sometimes females stay with their mothers til they are 6 weeks. Those rats are way too young to have been bought!

I WOULD NOT put them with the others until you can find out for certain whether they are indeed both females. Like I said, most petstore employees cannot tell them apart and at that young an age can be easily mistaken for the opposite sex. If I were you I would go purchase a can of KMR milk replacer and offer it in a tiny dish so they can lap that up. They should be starting to eat solid food around this time though, so make sure they also have their other food. You can offer babies baby food, such as minced meet or poultry etc. If they indeed that young they will need it. Otherwise they can die.