My little Horror show

The non-pony cries were what kept me from falling into deep slumber. It sounded like a dog in pain. I was transfixed to the spot, listening as pounding hoof steps stopped at what can only be next door.

What sounded like a metal door banged open. “Shut up! You excuse of a mutt!” A mare’s voice boomed in the silences.
I whipped my head towards the painting of the dog, as the noise quieted down to a soft whimper before stopping altogether.

My door opened with a creak. Derpy peeked in, the light of her candle flickered across her face. “Sorry ‘bout that. The mutt next door was causing some problems.”

Regarding my questing face, she pressed on:”You do not need to know who’s resigning next door.” She shut the door again.
I waited for a few minutes, which felt like forever, just to make sure she had gone, before lightly opening my door. I silently walked next door.

The door to room 203 was a rusty yellow. It was heavily locked, like one that was keeping a criminal shut in. It was out of place, but it felt in place at the same time. I peeked into the keyhole, and saw a nearly empty room. The barred window barely lets any light in.A sharp growl and a magenta eye flashed through the hole. I was so shocked; I fell back and landed on my side.

“So, you've found Screw loose." A voice came from above me, and I turned up to find Derpy standing right above me. "She’s caused us a lot of trouble when she first arrived. She used to be a sane pony until something snapped.”

Thunder boomed in the silences and a deafening howl followed. “We don’t know what happened, she just started biting and growling at the guests. Bones started to disappear from the kitchen. We had to keep her under control, for her own safety as well as every pony else. ”

She began walking down the hallway. “A pity really. She was one of the nicer guests before she thought she was a canine.” She turned towards me.” I would recommend keeping your door closed at night. You wouldn't want to wake up with something of your's missing.”
She walked away, muttering about something, as another howl accompanied another round of thunder.