So sorry for your loss. I (the writer this time speaking; instead of cats impersonista) had a dog looong time ago. He had diabetes he had hard times near the end. So, I know what you feel. It is pain for onself as one can see its little fur in pain/sick. As I wrote early (as that time cat impersonista). She enjoyed and was lucky to have you. You did what you could, and, sincerely, more than what people would usually do.