Magda, that is such a sad and touching story. So sorry to hear this. It is SO easy to overlook illness in pets, and you are not alone in having missed the signs.

I am looking forward to seeing it in Catness, and you know what would be excellent? Why don't you write something about your cat telling of all the happy times, celebrate his life, add lots of photos, tell us anecdotes about him, and let's put in the memorial section of Catness.