Thank you for your positive words from obviously cat lovers
Searching google I have found that it could be vestibular disease. He is staying overnight at the vets and won't hear any more till tomorrow. The house seems strange and empty to be without any cats (the first time in almost 30 years!) Both my earlier cats suffered from Saddle thrombus which suddenly occured without warning late at night. And involved vet visits in the early hours with alas the same outcome. So I am sensitve to any odd or bad signs from my cats now...
Very sad to hear of your two siamese -slinger. We had a blue point many years ago who we got when on holiday in Cornwall!
J Dot. So sorry to hear and hope you have as much time as you can with your lovely cat. The time you have is never long enough...
kitari. Thanks for your kind offer. Is your avatar one of your cats?
bill