my heart aches with you during this time. My first cat growing up was also called Blackie, and he passed away in similar circumstances when the vet trip was planned.
how wonderful though that he passed on at home - in the place where he knew how much he was loved, and he spent 21 years there - 23 years is an amazing long life for Blackie and is proof of how much he was loved
There are many of us here that can join in your sorrow at this time. It takes time but it will become easier. Your tears will become smiles as you remember the happy times
Blackie is forever watching over you in the place where he is now healthy and chasing the butterflies and mice forever.... he will wait there until he sees you again and once more you will be reunited.
Enjoy your wings
RIP angel Blackie