When to switch to rats?

[Python-77]

I currently feed my mouse one feeder mouse a week. When should I switch her over to rats? How do I know when she will be able to handle one? Thanks.

May I ask why you are feeding mice to mice?>>>>> J/K

When to switch well maybe never Ihave a 3 footer that still only eats mice. The general rule of thumb is not to feed a prey item that is larger than the widest point of there body, so once your snake is large of size you can try and change over.