What are some rough idea drafts for stories you have?

A few months ago a deli near me caught on fire, with the apartments on top of it. Afterward there were multiple missing cat posters. To me it was obvious that if the owners had locked their doors upon leaving that day, and even if they hadn't locked their doors, the cats most likely never had a chance to even leave the apartment, and probably all died. Every poster had a different tone to them though. Some sounded slightly cheerful and hopeful. Some were sparse and seemed slightly resigned. Some had a few lines about the personality of the cat. Some offered a reward.

The idea I had was to write a triptych of three of these cat owners, how they each dealt with their loss in the initial stages of denial. How each made their posters, how far they each walked to paste these posters up. How long they kept the posters updated as they inevitably withered away on the streetlight posts. A bit morbid and pessimistic of me, maybe a little exploitative too, but I was drawn to this idea as my own dear family pet I grew up with is getting to the age where her death is foreseeable, and her mental decline evident. I'm not sure how I will deal with her passing.