Question Author
I think we are all getting prepared to be honest. He has had such a good life, my daughter brought him home when he was really too young to have left his mum but they were all about to be destroyed back then if homes weren't found. He has never had any injections since the initial ones, we have been lucky with him, he went to the vets about a month ago when his fur started looking manky and he said he was fine and just to brush him. He does not look 20 at all - thank you for your replies, I never thought about diabetes.