You're exactly right

That's also why I transferred her into a plastic carrier, versus a metal crate. After I covered the door with a towel, she retreated to the back corner (calmed down would be saying too much).
What I have at home is a medium sized metal dog crate. But then again, with it being all metal, I'm worried that she may react the same way she did in the trap...
The vet did an initial check-up last night when I dropped her off. She's actually only about six months old, judging from her teeth, which would explain why she's so light.