cross-posted from my LJ
A cat was just yowling outside my door. It was an unfamiliar cat, it sounded very upset, it looked like it had been in a fight, and when it walked away, it was limping.

I don't know if it's a stray or a new neighborhood cat, how it got injured, or how badly injured it is. So, I'm not sure what to do. Especially since it's 1 am, and by the time any place is open, the cat will be long gone.

Advice, please? Should I call the Humane Society or some civic service to look into the matter? Should I wait to see if the cat turns up hurt again? Just ignore it?