Help Raider survive!

I'm only doing this because of the dire situation we are in.  Jack and I decided we wanted to adopt a pit mix puppy back in 2009.  We found Raider a black and white 8 week old puppy and fell in love.  About a year later we found Duke as a stray.  The two lived peacefully for 3 years then Lady came around.  Since then there have been a few major incidents where the two rescues have attacked Raider.  This past week was the worst of it.  Now we have Raider in ICU with the possibility of his hind leg being amputated and we have to find loving homes for Duke and Lady.  They are all great dogs but as time went by the boys ended up not getting along.  We will never give up on Raider as he is the definition of an exlemperlary dog.  For you that have met him you know how he is.  The bills are going to continue to go up and we are asking for any help you can donate.  If they do have to amputate it could be between 15-20k.  And no putting him down will never be an option.  God bless and please keep Raider in your thoughts.