Oh georgiesmomma, I am so sorry. It is so sad when a special needs kitty has someone who really takes care of them, but somehow they just can't stay. I don't know what happened, but I do know that whenever you see skeletal problems, it does make you alert that there could be heart problems as well. Sometimes the two go together. But you know, he had the best life he could living with you for his short time, and he was so lucky to have you. I am really sorry. I hope you have some pictures to remember him by. It seems like the more they need us, the closer we become, and then the harder it is when we lose them. I hope you will see him again someday.