Sounds like she's not hungry and the rats are annoying her by being in her space. You didn't say if you were feeding live or f/t.

I have a big girl who struck twice and "missed" last night when she's usually dead on. Then I realized, she just wasn't hungry and the rat was annoying her. So, I removed it and fed it to someone who WAS hungry.

It's ok if she misses a week or two. Sounds like she's letting her body "catch up" from the previous meals.