5pm vet phoned and his sugars had crashed and he was distressed.
Vet thought it was likely to be something fairly major like a pancreatic tumour which would account for wildly swinging blood sugars and low potassium.
We went in at 6 to say our goodbyes.
Strangely, haven't cried, not yet upset - he was so out of it anyway I feel we lost him days ago.
RIP my lad, I can see you're spraying for England already at the bridge - we may all need umbrellas for a long time to come.