I brought home a nice small rat, with plenty of mouse bedding in the box, so it was really stinky.
I gave Flannery a long chance to eat it, but nothing. In fact she "ran" away from it as fast as she could.
I think she is actually afraid of rats! They are much bolder than the mice and get right in her face, and I think she is just scared.

So I took the rat back to the store a couple days later (we go to a little local place where they know everyone) and they gave me 2 mice instead, which of course she ate with no problem.

Should I just keep going with mice? Is there anything else I can do to make the switch to rats?

I feel like I'm dealing with a stubborn 2 year old who will only eat peanut butter and jelly sandwiches.