Sorry for your loss, Giz. Think i'm right in believing you hinted at this outcome in another thread a couple of says back. Sounds like the same symptoms to the ones that caused me to let my 15 year old Molly go a couple of years back. Back legs gone, bit of a hump in the back, riddled with arthritis, some incontinence. Best thing for a dog in that condition is to let it go.
Togo; it took me about 12 months before i got another dog. But i'm really glad i did. My little Jack Russell makes me laugh almost every day (almost as much as our attempts on the nags) and i do believe he has breathed new life into my home.