I'm devastated. He was diagnosed with vestibular disease two weeks ago and seemed to be improving, but took a turn for the worse over the weekend. An ultrasound today showed advanced cancerous tumours in his kidney and intestine. Almost certainly the vestibular issues meant a third tumour in his brain - maybe more elsewhere. There was no realistic treatment - I made the decision it wasn't fair on him to continue.
He was only 18 months old, and I'm so worried for his brother - they've never been apart and were super bonded.
We're all gutted - he was just the sweetest cat with a wonderful temperament. I'm going miss him so much.