Thanks all - your kind words mean so much.
I can't stop crying, I will miss him so much.
And poor Buttercup - they were such a snuggly pair
The dental started fine, and then he suddenly stopped breathing and his heart stopped. The vets and nurses spent 45 minute resucitating him. He had started to recover and then went downhill again.
It broke my heart to say goodbye to him.
It was even sadder to put his little body in with Buttercup so that Butters could say goodbye too