That is so sad !!! And you are so brave to have made that decision , they say it's better a day to early than a day to late , you were totally unselfish and put his needs before your own , it's a true testament to the love you had for him .
Again I am gutted for you , you and GDOGS have been an active member of this site since I joined about 6 yrs ago so I myself feel like Iv lost a special friend in his passing ..
Run hard and free sweet boy and look down on your family and help ease their pain until you meet again .