Poppy by Avi (there are others in the Dimwood Forest (?) or Dimwood Tales (something like that?) series.
Mrs. Frisby and the Rats of NIMH
The Tale of Desperaux (sp?) by Kate DiCamillo
Redwall (maybe too old for your children)
They’re all about mice and rats! I hate mice! I hate rats! I’m beginning to think we need to find some new read alouds, too! *L*
Brighty of the Grand Canyon – has people in it, too. Brighty doesn’t really talk or anything, so maybe that’s not quite what you’re looking for.
The Hundred and One Dalmations by Dodie Smith (see? we do read books that aren’t about mice or rats!)
How about the Raggedy Ann series? (by somebody Gruelle? or Gruel or something like that) I had a hard time reading the first book out loud, because it just seemed tedious to me, but probably listening to them on CD would work good.
That’s all I can think of at the moment.