I remember reading a poem many years ago in school about a little boy left at home alone with the family cat and the boy ends up torturing the cat and killing it. The cat comes back to haunt him.
I vaguely remember that the author might have been John Betjeman and the poem may have been called “Guilt” or something.
I have googled and googled and googled but I can’t find it.
Once, when a boy, I killed a cat.
I guess it’s just because of that
A cat evokes my tenderness,
And takes so kindly my caress.
…
For look you - after three-score years
I see with anguish nigh to tears
That starveling cat so sudden still
I set my terrier to to kill.
Great, golden memories pale away,
But that unto my dying day
Will haunt and haunt me horribly. …
Actually, the above poem doesn’t seem to fit your description. The best I can offer is a bibliography, which might help you find individual volumes so you can scan the indexes. Your best bet might be to write to the organization I’ve linked, or to find a volume of complete works, if they exist.
And if that doesn’t work, you might try asking on some of the Usenet newsgroups like rec.arts.poetry or rec.arts.poems or alt.arts.poetry.comments. Good luck.