Gaining weight...

Cu's been to the vet every 2 weeks for RI meds. Anyways, she gets weighed every time.

Vet assistant says she gained a pound since her last appointment, and she's only eaten one small mouse since then.

How does that work? Is it waterweight, maybe?

Vets Scale is off.

scale wayyy off, you should get your own, that way you can monitor yourself should she go off feed again

A pound?? A pound is about 450 grams. No way she gained that much off of one mouse. Plus that is a big difference in a BP. You'd have noticed if she put on that much extra weight.