I’m looking for a short story about an enchanted cat, that might have been in an anthology of Halloween stories, possibly published in the mid to late 60s. It might have been set in colonial times. The cat’s human companion is unaware of his magic powers until there’s a crisis in the town. The cat goes out to save the night, then comes back, drained of magic, and his last words as the glow fades from his eyes are the instructions to be sure to provide fresh cream (or was it milk?) every day. Thanks so much if you can help me find this!