Thank you for the comforting message. I do know that he loved Minki and I was told before by other people that he loves cats and most people with cats prefer to go to him. I even saw him several times bending down and give her a hug on the table before giving her the usual injection.
Maybe it was unfair of me to tell what I thought but I am hurting so much and my mind is just running with what did happened.
I just wished she could have died during the night because to take a cat to be put down is just terrible. I know I did the right thing as she clearly was in pain and stopped eating. Thanks again to all for the support and advice.