You have my deepest sympathies- it's so tough to lose a wonderful friend after so many happy years- but as others have said, he's now at the Bridge, no more bum legs or ANY health problems- and, I'm SURE Nimrod wouldn't want you to be too lonely- so, consider adopting ANOTHER fur-friend in desperate need, as you adopted Nimrod so many years ago- I'm sure Nimrod will guide you to another wonderful companion, and smile when you offer the new rescue the same love and happy life that he had for so long..... there are SO many wonderful cats, and other animals, out there, who NEVER have the chance for the great life Nimrod had with his loving parents............. he'll guide you, it truly does seem to work that way....
R.I.P. and play well at the Bridge, Nimrod-- you were certainly loved and certainly returned that love for a long time....... best wishes and peace to your family who misses you so much....