This is outrageous. I just pulled the cage away from the wall and what do I see?? The wall has pale yellow streak marks. There is even, *gulp* a rat "raisin" stuck to the wall. I'm appalled. What are these girls doing? My freshly painted "pink bauble" wall! Yikes!
Oh well. Best find a solution to this dirty little problem.
The funniest part of all this is that the next time I meet a rat-ignorant person, I'll delve into my same old schpiel - "...and rats are so clean. They wash fastidiously. They really are so wonderful..."
(It's been a week since the last cleaning, and I didn't notice any signs of this before...they've been working hard at being filthy)