Oh Michelle, what a bittersweet ending. Even though McClure is off to a wonderful retirement and you can still visit, it is always so hard to part with a beloved pet. I have been thinking recently of going abroad for an extended period of time and the ONE THING that makes me reconsider is my kitty! Of all the things to hold me back! Even though I know she will be well looked after, the thought of being away from her for any length of time fills me with pangs of separation anxiety.
That said, it must be a good feeling that he is still a part of your family and will be living like a furry little prince. While no one can replace him, I'm sure the new pup will fill the void in no time at all.