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The story makes me think of "General" from Cat's Eye
Scratch that, it might be "The Price" by Neil Gaiman
Edited by jormis29
Seconding "The Price".
(I've been following the progress of the animated version. The previews are looking pretty good, but it's proceeding slowly because it's basically a one-man operation.)
Yep, it's the Neil Gaiman story. It was included in the M is for Magic story collection, probably a couple of others too.
Yes, it's The Price! Thank you everyone!
Short story written by a male author, told from POV of the father. I believe there is an animated version in the works, last time I checked (about a year ago)?
The family first starts to experience misfortune. A black cat shows up, which they take in. Their luck suddenly gets better, but the cat shows up with increasingly worse wounds every morning. Worried about the cat, the father takes the cat into the basement to heal for two days, during which the family suffers misfortune again. When they finally let it out, the father watches the cat to discover that it has been fighting some sort of shapeshifting demon at night and protecting the family. However, the cat is becoming increasingly injured, and there's no telling how long it will be able to continue the nightly battles.
Any idea as to the title would be much appreciated!