Hi. I have been following this thread and joined the forum with it in mind.
I too would like to say my thoughts are with you, Oliver's Mummy, and with Oliver. You are doing so well by your boy. It is wonderful that he is loved so well.
Many Cavaliers with SM live to wonderful old ages almost unaffected by the condition. Unfortunately some do not, and I have been doing all I can to learn about this condition since a good friends dog was diagnosed a couple of years ago. He is doing well thanks to medications and management.
I wanted to provide a couple of links that might interest Oliver's Mummy. There is a UK based forum, Cavalier talk board, which is very informative about Cavaliers with SM, and offers wonderful support for owners.http://board.cavaliertalk.com/
There is also a site called Cavalier Health Org which keeps up with all the current research on SM and other Cavalier ailments.http://www.cavalierhealth.org/
Last, there is a documentary being aired in Canada on Monday on CBC at 10 p.m. ET. It is called Pedigree Dogs Exposed. It played on the BBC in the UK in August to about 5 million viewers and raised a bit of a fuss there. As its title expresses, it is an expose of poor breeders of pedigree dogs, and some of the problems that follow, but it spends a good amount of time on the Cavalier breed, syringomyelia and MVD. There are heartwrenching moments, but I believe it is something most Cavalier owners would be be interested in watching.
Best wishes for you and your little boy. My Cavalier always wins in that kissing game too. They are such loves.