Wow. I'd never have imagined that could have happened without impact. Are you sure it wasn't already bent a little beforehand? I have upgraded mine, but before I did, you could tell both of mine had slight upward curves in them.
1/2 n 1/2
see the avatar for the half cage with full rack. Loved it last year but got bored. Going to put the full cage back on this month if I find the time. Then again this weekend it will be 97 degrees so it may be this weekend or never. I have to find the warm dayb if I want the top to fit - stretch it out.
I'm contemplating thinking about thinking about it!