I sincerely hope your thoughts are wrong, try not to think about it too much and be sad, because it probably won't happen, if he is healthy and doing well, the signs are good that Duke will be with you many more years, sometimes we just get these feelings, I am the biggest worry wart in the world, and am always being told, why worry about something that may never happen, just passing on that, as those who say it to me are usually right.

Finger and paws crossed here that Duke will continue to be with you for many years to come, and stop worrying, from one worry wart to another lol.