I tried locking Piper outside my bedroom one day, but I was afraid the lady downstairs would report me. He was wailing louder than he ever had before, and ramming the door (apparently).
When I let him in, he was silent for five minutes, and I thought I would FINALLY get some sleep.
Then, WAAAAAAAAAAAAAAAAAAAAAAAAAH!
ouch! Molly usually have a really quiet meow. But if you do not giver her attention, she puts the noise level up.